list.org

list.org is SSL secured

Free website and domain report on list.org

Last Updated: 7th October, 2022 Update Now
Overview

Snoop Summary for list.org

This is a free and comprehensive report about list.org. Our records indicate that list.org is owned/operated by John Viega. List.org has the potential to be earning an estimated $3 USD per day from advertising revenue. If list.org was to be sold it would possibly be worth $2,176 USD (based on the daily revenue potential of the website over a 24 month period). List.org receives an estimated 1,041 unique visitors every day - a large amount of traffic! This report was last updated 7th October, 2022.

About list.org

Site Preview: list.org list.org
Title: Mailman
Description: GNU Mailman
Keywords and Tags: hardware, software
Related Terms: gnu
Fav Icon:
Age: Over 27 years old
Domain Created: 6th June, 1996
Domain Updated: 4th November, 2018
Domain Expires: 6th May, 2024
Review

Snoop Score

2/5

Valuation

$2,176 USD
Note: All valuation figures are estimates.

Popularity

Modest
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 788,597
Alexa Reach:
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors: 1,041
Monthly Visitors: 31,687
Yearly Visitors: 379,993
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $3 USD
Monthly Revenue: $90 USD
Yearly Revenue: $1,083 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top New Follow Links

Top Ranking Keywords (US)

Domain Analysis

Value Length
Domain: list.org 8
Domain Name: list 4
Extension (TLD): org 3
Expiry Check:

Page Speed Analysis

Average Load Time: 1.90 seconds
Load Time Comparison: Faster than 44% of sites

PageSpeed Insights

Avg. (All Categories) 83
Performance 94
Accessibility 97
Best Practices 86
SEO 100
Progressive Web App 37
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
Simulate loading on desktop
94

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for list.org. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Speed Index — 1.1 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 1.1 s
The timing of the largest text or image that is painted.
Time to Interactive — 1.1 s
The time taken for the page to become fully interactive.
Total Blocking Time — 0 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.001
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 1.1 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 20 ms
Users could experience a delay when interacting with the page.
Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive list.org as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://list.org/
0
56.397999986075
3538
10028
200
text/html
Document
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
67.776000010781
91.64600004442
19176
113498
200
text/css
Stylesheet
http://list.org/css/bootstrap.min.css
67.897000000812
267.00100000016
120735
120485
200
text/css
Stylesheet
http://list.org/theme/css/main.css
68.090000073425
96.12800006289
3731
3485
200
text/css
Stylesheet
http://list.org/theme/css/solarized-light.css
68.267000024207
139.55800002441
4170
3924
200
text/css
Stylesheet
http://list.org/css/style.css
68.454000051133
227.33400005382
540
295
200
text/css
Stylesheet
https://code.jquery.com/jquery-1.10.1.min.js
68.759000045247
89.068999979645
33334
93064
200
application/javascript
Script
https://code.jquery.com/jquery-migrate-1.2.1.min.js
69.034000043757
85.621000034735
3567
7199
200
application/javascript
Script
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js
69.365000003017
87.310999981128
9912
35601
200
text/javascript
Script
http://list.org/images/logo2010-2.jpg
228.86600007769
257.6569999801
11564
11314
200
image/jpeg
Image
http://list.org/theme/images/python-logo.png
260.33800002187
275.75899998192
9006
8758
200
image/png
Image
https://fonts.googleapis.com/css?family=Raleway:400,700
269.51100002043
283.62700005528
1485
3166
200
text/css
Stylesheet
https://fonts.gstatic.com/s/raleway/v18/1Ptug8zYS_SKggPNyC0IT4ttDfA.woff2
346.062000026
349.09200004768
43013
42444
200
font/woff2
Font
http://list.org/fonts/glyphicons-halflings-regular.woff2
346.58700006548
442.15400004759
18292
18028
200
application/octet-stream
Font
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
85.81
6.999
119.615
5.11
295.299
6.089
312.484
100.657
415.994
6.176
422.662
5.969
470.673
6.035
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Properly size images
Images can slow down the page's load time. List.org should consider serving more appropriate-sized images.
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. List.org should consider lazy-loading offscreen and hidden images.
Minify CSS — Potential savings of 3 KiB
Cascading Style Sheets (CSS) files can contribute to network payload sizes. List.org should consider minifying CSS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
http://list.org/theme/css/solarized-light.css
4170
2575
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. List.org should consider minifying JS files.
Remove unused JavaScript — Potential savings of 20 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://code.jquery.com/jquery-1.10.1.min.js
33334
20719
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 60 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
http://list.org/
57.397
Avoid multiple page redirects
Redirects can cause additional delays before the page can begin loading. List.org should avoid multiple or unnecessary page redirects.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.

Diagnostics

Avoids enormous network payloads — Total size was 275 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
http://list.org/css/bootstrap.min.css
120735
https://fonts.gstatic.com/s/raleway/v18/1Ptug8zYS_SKggPNyC0IT4ttDfA.woff2
43013
https://code.jquery.com/jquery-1.10.1.min.js
33334
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
19176
http://list.org/fonts/glyphicons-halflings-regular.woff2
18292
http://list.org/images/logo2010-2.jpg
11564
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js
9912
http://list.org/theme/images/python-logo.png
9006
http://list.org/theme/css/solarized-light.css
4170
http://list.org/theme/css/main.css
3731
Avoids an excessive DOM size — 141 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
141
Maximum DOM Depth
10
Maximum Child Elements
8
Avoid chaining critical requests — 9 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. List.org should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.0 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://code.jquery.com/jquery-1.10.1.min.js
92.851
38.564
2.413
Minimizes main-thread work — 0.2 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Style & Layout
53.777
Script Evaluation
49.089
Other
32.984
Parse HTML & CSS
16.843
Rendering
5.993
Script Parsing & Compilation
4.827
Keep request counts low and transfer sizes small — 14 requests • 275 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
14
282063
Stylesheet
6
149837
Font
2
61305
Script
3
46813
Image
2
20570
Document
1
3538
Media
0
0
Other
0
0
Third-party
6
110487
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
44498
0
36901
0
29088
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
0.00069939234743017
6.6060020802429E-6
4.496522424367E-6
4.3854971793209E-6
3.9413961991365E-6
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 1 long task found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://code.jquery.com/jquery-1.10.1.min.js
540
50
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

First Contentful Paint — 1.1 s
The time taken for the first image or text on the page to be rendered.

Other

First Meaningful Paint — 1.1 s
The time taken for the primary content of the page to be rendered.

Opportunities

Remove unused CSS — Potential savings of 128 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. List.org should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
http://list.org/css/bootstrap.min.css
120735
113398
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
19176
18014
Enable text compression — Potential savings of 103 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
http://list.org/css/bootstrap.min.css
120485
100628
http://list.org/theme/css/solarized-light.css
3924
2860
http://list.org/theme/css/main.css
3485
2419
Preload key requests — Potential savings of 310 ms
Key requests can be preloaded by using '<link rel=preload>'. List.org should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
URL Potential Savings (Ms)
http://list.org/fonts/glyphicons-halflings-regular.woff2
310

Opportunities

Eliminate render-blocking resources — Potential savings of 930 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. List.org should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
19176
310
http://list.org/css/bootstrap.min.css
120735
430
http://list.org/theme/css/main.css
3731
110
http://list.org/theme/css/solarized-light.css
4170
110
http://list.org/css/style.css
540
110
https://code.jquery.com/jquery-1.10.1.min.js
33334
350
https://code.jquery.com/jquery-migrate-1.2.1.min.js
3567
230
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js
9912
270

Diagnostics

Serve static assets with an efficient cache policy — 7 resources found
List.org can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
http://list.org/css/bootstrap.min.css
0
120735
http://list.org/fonts/glyphicons-halflings-regular.woff2
0
18292
http://list.org/images/logo2010-2.jpg
0
11564
http://list.org/theme/images/python-logo.png
0
9006
http://list.org/theme/css/solarized-light.css
0
4170
http://list.org/theme/css/main.css
0
3731
http://list.org/css/style.css
0
540
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://fonts.gstatic.com/s/raleway/v18/1Ptug8zYS_SKggPNyC0IT4ttDfA.woff2
3.0300000216812
http://list.org/fonts/glyphicons-halflings-regular.woff2
95.566999982111
97

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of list.org. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
List.org may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
List.org may provide relevant information that dialogue cannot, by using audio descriptions.

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
86

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that list.org should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids `unload` event listeners
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
Bootstrap
3.3.1
jQuery
1.10.1
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Page has valid source maps
Consider deploying source maps for added benefits such as the ability to debug while in production.

Audits

Does not use HTTPS — 8 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://list.org/
http://list.org/css/bootstrap.min.css
http://list.org/theme/css/main.css
http://list.org/theme/css/solarized-light.css
http://list.org/css/style.css
http://list.org/images/logo2010-2.jpg
http://list.org/theme/images/python-logo.png
http://list.org/fonts/glyphicons-halflings-regular.woff2
Includes front-end JavaScript libraries with known security vulnerabilities — 9 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
5
Medium
4
Medium
100

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for list.org. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of list.org on mobile screens.
Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
37

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of list.org. This includes details about web app manifests.

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of list.org on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 8 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://list.org/
http://list.org/css/bootstrap.min.css
http://list.org/theme/css/main.css
http://list.org/theme/css/solarized-light.css
http://list.org/css/style.css
http://list.org/images/logo2010-2.jpg
http://list.org/theme/images/python-logo.png
http://list.org/fonts/glyphicons-halflings-regular.woff2
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Does not redirect HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 77
Performance 71
Accessibility 97
Best Practices 79
SEO 100
Progressive Web App 39
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
Simulate loading on mobile
71

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for list.org. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Total Blocking Time — 0 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Max Potential First Input Delay — 20 ms
Users could experience a delay when interacting with the page.
Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive list.org as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://list.org/
0
17.051000148058
3538
10028
200
text/html
Document
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
30.660999938846
58.044000063092
19176
113498
200
text/css
Stylesheet
http://list.org/css/bootstrap.min.css
30.847999965772
104.41699996591
120735
120485
200
text/css
Stylesheet
http://list.org/theme/css/main.css
31.244999961928
62.171000055969
3731
3485
200
text/css
Stylesheet
http://list.org/theme/css/solarized-light.css
31.533000059426
49.012999981642
4170
3924
200
text/css
Stylesheet
http://list.org/css/style.css
31.743000028655
61.550999991596
540
295
200
text/css
Stylesheet
https://code.jquery.com/jquery-1.10.1.min.js
32.353000016883
94.963000155985
33334
93064
200
application/javascript
Script
https://code.jquery.com/jquery-migrate-1.2.1.min.js
32.69000002183
51.313000032678
3567
7199
200
application/javascript
Script
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js
32.863999949768
52.065999945626
9912
35601
200
text/javascript
Script
http://list.org/images/logo2010-2.jpg
103.53600000963
118.35400015116
11564
11314
200
image/jpeg
Image
http://list.org/theme/images/python-logo.png
105.97899998538
120.75300002471
9006
8758
200
image/png
Image
https://fonts.googleapis.com/css?family=Raleway:400,700
106.77099996246
122.12099996395
1396
3166
200
text/css
Stylesheet
https://fonts.gstatic.com/s/raleway/v18/1Ptug8zYS_SKggPNyC0IT4ttDfA.woff2
170.68400001153
174.17700006627
43011
42444
200
font/woff2
Font
http://list.org/fonts/glyphicons-halflings-regular.woff2
171.33500007913
200.31900005415
18292
18028
200
application/octet-stream
Font
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
55.664
8.107
95.036
8.083
141.072
7.144
159.15
82.522
245.507
9.871
256.358
8.622
266.332
8.771
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Properly size images
Images can slow down the page's load time. List.org should consider serving more appropriate-sized images.
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. List.org should consider lazy-loading offscreen and hidden images.
Minify CSS — Potential savings of 3 KiB
Cascading Style Sheets (CSS) files can contribute to network payload sizes. List.org should consider minifying CSS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
http://list.org/theme/css/solarized-light.css
4170
2575
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. List.org should consider minifying JS files.
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 20 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
http://list.org/
18.042
Avoid multiple page redirects
Redirects can cause additional delays before the page can begin loading. List.org should avoid multiple or unnecessary page redirects.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.

Diagnostics

Avoids enormous network payloads — Total size was 275 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
http://list.org/css/bootstrap.min.css
120735
https://fonts.gstatic.com/s/raleway/v18/1Ptug8zYS_SKggPNyC0IT4ttDfA.woff2
43011
https://code.jquery.com/jquery-1.10.1.min.js
33334
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
19176
http://list.org/fonts/glyphicons-halflings-regular.woff2
18292
http://list.org/images/logo2010-2.jpg
11564
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js
9912
http://list.org/theme/images/python-logo.png
9006
http://list.org/theme/css/solarized-light.css
4170
http://list.org/theme/css/main.css
3731
Avoids an excessive DOM size — 141 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
141
Maximum DOM Depth
10
Maximum Child Elements
8
Avoid chaining critical requests — 9 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. List.org should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.1 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://code.jquery.com/jquery-1.10.1.min.js
296.98
101.028
9.528
http://list.org/
137.732
11.816
4.2
Unattributable
94.788
4.688
0.636
Minimizes main-thread work — 0.6 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Style & Layout
211.772
Other
149.276
Script Evaluation
148.404
Parse HTML & CSS
82.856
Rendering
29.064
Script Parsing & Compilation
20.292
Keep request counts low and transfer sizes small — 14 requests • 275 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
14
281972
Stylesheet
6
149748
Font
2
61303
Script
3
46813
Image
2
20570
Document
1
3538
Media
0
0
Other
0
0
Third-party
6
110396
Minimize third-party usage — Third-party code blocked the main thread for 70 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
36901
70.952
44407
0
29088
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
9.1033460501375E-5
6.1963952105978E-5
6.0433977979905E-5
5.4314081475611E-5
4.8959172034353E-5
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 1 long task found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://code.jquery.com/jquery-1.10.1.min.js
2010
165
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

Speed Index — 4.3 s
The time taken for the page contents to be visibly populated.
Time to Interactive — 4.3 s
The time taken for the page to become fully interactive.

Other

First CPU Idle — 4.3 s
The time taken for the page's main thread to be quiet enough to handle input.

Opportunities

Remove unused JavaScript — Potential savings of 20 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://code.jquery.com/jquery-1.10.1.min.js
33334
20719

Metrics

First Contentful Paint — 4.3 s
The time taken for the first image or text on the page to be rendered.
Largest Contentful Paint — 4.3 s
The timing of the largest text or image that is painted.

Other

First Meaningful Paint — 4.3 s
The time taken for the primary content of the page to be rendered.
First Contentful Paint (3G) — 8820 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Opportunities

Eliminate render-blocking resources — Potential savings of 3,670 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. List.org should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
19176
1230
http://list.org/css/bootstrap.min.css
120735
1980
http://list.org/theme/css/main.css
3731
480
http://list.org/theme/css/solarized-light.css
4170
480
http://list.org/css/style.css
540
330
https://code.jquery.com/jquery-1.10.1.min.js
33334
1530
https://code.jquery.com/jquery-migrate-1.2.1.min.js
3567
930
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js
9912
1080
Remove unused CSS — Potential savings of 131 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. List.org should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
http://list.org/css/bootstrap.min.css
120735
115496
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css
19176
18337
Enable text compression — Potential savings of 103 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
http://list.org/css/bootstrap.min.css
120485
100628
http://list.org/theme/css/solarized-light.css
3924
2860
http://list.org/theme/css/main.css
3485
2419
Preload key requests — Potential savings of 1,230 ms
Key requests can be preloaded by using '<link rel=preload>'. List.org should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
URL Potential Savings (Ms)
http://list.org/fonts/glyphicons-halflings-regular.woff2
1230

Diagnostics

Serve static assets with an efficient cache policy — 7 resources found
List.org can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
http://list.org/css/bootstrap.min.css
0
120735
http://list.org/fonts/glyphicons-halflings-regular.woff2
0
18292
http://list.org/images/logo2010-2.jpg
0
11564
http://list.org/theme/images/python-logo.png
0
9006
http://list.org/theme/css/solarized-light.css
0
4170
http://list.org/theme/css/main.css
0
3731
http://list.org/css/style.css
0
540
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://fonts.gstatic.com/s/raleway/v18/1Ptug8zYS_SKggPNyC0IT4ttDfA.woff2
3.493000054732
http://list.org/fonts/glyphicons-halflings-regular.woff2
28.983999975026
97

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of list.org. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
List.org may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
List.org may provide relevant information that dialogue cannot, by using audio descriptions.

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
79

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that list.org should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids `unload` event listeners
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
Bootstrap
3.3.1
jQuery
1.10.1
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Page has valid source maps
Consider deploying source maps for added benefits such as the ability to debug while in production.

Audits

Does not use HTTPS — 8 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://list.org/
http://list.org/css/bootstrap.min.css
http://list.org/theme/css/main.css
http://list.org/theme/css/solarized-light.css
http://list.org/css/style.css
http://list.org/images/logo2010-2.jpg
http://list.org/theme/images/python-logo.png
http://list.org/fonts/glyphicons-halflings-regular.woff2
Includes front-end JavaScript libraries with known security vulnerabilities — 9 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
5
Medium
4
Medium

Audits

Serves images with low resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
URL Displayed size Actual size Expected size
http://list.org/images/logo2010-2.jpg
232 x 100
244 x 105
609 x 263
http://list.org/theme/images/python-logo.png
200 x 80
200 x 80
525 x 210
100

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for list.org. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of list.org on mobile screens.
Document uses legible font sizes — 100% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
100.00%
≥ 12px
Tap targets are sized appropriately — 100% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
39

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of list.org. This includes details about web app manifests.

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of list.org on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 8 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://list.org/
http://list.org/css/bootstrap.min.css
http://list.org/theme/css/main.css
http://list.org/theme/css/solarized-light.css
http://list.org/css/style.css
http://list.org/images/logo2010-2.jpg
http://list.org/theme/images/python-logo.png
http://list.org/fonts/glyphicons-halflings-regular.woff2
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Does not redirect HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 104.239.228.201
Continent:
Country:
Region:
City:
Longitude:
Latitude:
Currencies:
Languages:

Web Hosting Provider

Name IP Address
Cloud Servers Cell 0001-0003 IAD3
Registration

Domain Registrant

Private Registration: No
Name: John Viega
Organization:
Country: US
City: Brooklyn
State: NY
Post Code: 11231
Email: john@viega.org
Phone: +1.2123210902
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Name IP Address
Name.com, Inc. 104.18.6.161
Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Safe
WOT Rating: 4.3/5 (0 reviews)
WOT Trustworthiness: 87/100
WOT Child Safety: 95/100
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: www.list.org
Issued By: Let's Encrypt Authority X3
Valid From: 1st November, 2020
Valid To: 30th January, 2021
Subject: CN = www.list.org
Hash: 31b46e1f
Issuer: CN = Let's Encrypt Authority X3
O = Let's Encrypt
S = US
Version: 2
Serial Number: 0x0430D0D80C20D6950B9F8C64FC2A56E4724D
Serial Number (Hex): 0430D0D80C20D6950B9F8C64FC2A56E4724D
Valid From: 1st November, 2024
Valid To: 30th January, 2024
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
Certificate Policies: Policy: 2.23.140.1.2.1
Policy: 1.3.6.1.4.1.44947.1.1.1
CPS: http://cps.letsencrypt.org

Authority Information Access: OCSP - URI:http://ocsp.int-x3.letsencrypt.org
CA Issuers - URI:http://cert.int-x3.letsencrypt.org/

SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
Timestamp : Nov 1 13:00:21.544 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:44:02:20:37:C9:1E:D8:4D:4D:41:7B:7C:93:8E:8D:
57:01:99:4B:03:B4:EC:61:AC:0A:09:1D:97:BB:93:62:
5D:81:8A:9A:02:20:0B:B4:FC:AE:E1:D2:EE:38:A6:ED:
FF:0A:A1:B5:A9:4E:15:C4:A3:20:70:2A:1C:36:CE:D2:
EB:6C:5A:27:71:3B
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 6F:53:76:AC:31:F0:31:19:D8:99:00:A4:51:15:FF:77:
15:1C:11:D9:02:C1:00:29:06:8D:B2:08:9A:37:D9:13
Timestamp : Nov 1 13:00:21.792 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:97:EF:F8:61:6A:16:7C:DB:D5:51:D3:
C0:61:AC:78:70:88:EC:7C:0E:4B:52:B8:54:03:E0:A4:
34:44:9D:B5:23:02:21:00:BF:5A:61:8F:38:AB:7D:54:
09:D3:E0:61:3C:54:58:6F:76:FF:07:A7:E1:1C:D1:7B:
08:93:DD:72:4E:2D:B5:10
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:lists.mailman3.org
DNS:mirror.list.org
DNS:mirror.mailman3.org
DNS:www.list.org
DNS:list.org
Technical

DNS Lookup

A Records

Host IP Address Class TTL
list.org. 104.239.228.201 IN 299

NS Records

Host Nameserver Class TTL
list.org. ns1ntw.name.com. IN 299
list.org. ns2dhj.name.com. IN 299
list.org. ns3bgq.name.com. IN 299
list.org. ns4fmw.name.com. IN 299

MX Records

Priority Host Server Class TTL
10 list.org. aspmx.l.google.com. IN 299
20 list.org. alt1.aspmx.l.google.com. IN 299
20 list.org. alt2.aspmx.l.google.com. IN 299
30 list.org. aspmx2.googlemail.com. IN 299
30 list.org. aspmx3.googlemail.com. IN 299
30 list.org. aspmx4.googlemail.com. IN 299
30 list.org. aspmx5.googlemail.com. IN 299

SOA Records

Domain Name Primary NS Responsible Email TTL
list.org. ns1ntw.name.com. support.name.com. 299

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Server: nginx/1.4.6 (Ubuntu)
Date: 27th December, 2020
Content-Type: text/html
Content-Length: 10028
Last-Modified: 9th December, 2020
Connection: keep-alive
ETag: "5fd1498e-272c"
Accept-Ranges: bytes

Whois Lookup

Created: 6th June, 1996
Changed: 4th November, 2018
Expires: 6th May, 2024
Registrar: Name.com, Inc.
Status: clientTransferProhibited
Nameservers: ns1ntw.name.com
ns2dhj.name.com
ns3bgq.name.com
ns4fmw.name.com
Owner Name: John Viega
Owner Street: 226 Union St
Owner Post Code: 11231
Owner City: Brooklyn
Owner State: NY
Owner Country: US
Owner Phone: Non-Public Data
Owner Email: https://www.name.com/contact-domain-whois/list.org/registrant
Admin Name: John Viega
Admin Street: 226 Union St
Admin Post Code: 11231
Admin City: Brooklyn
Admin State: NY
Admin Country: US
Admin Phone: Non-Public Data
Admin Email: https://www.name.com/contact-domain-whois/list.org/admin
Tech Name: John Viega
Tech Street: 226 Union St
Tech Post Code: 11231
Tech City: Brooklyn
Tech State: NY
Tech Country: US
Tech Phone: Non-Public Data
Tech Email: https://www.name.com/contact-domain-whois/list.org/tech
Full Whois: Domain Name: LIST.ORG
Registry Domain ID: D5081337-LROR
Registrar WHOIS Server: whois.name.com
Registrar URL: http://www.name.com
Updated Date: 2018-04-11T21:39:00Z
Creation Date: 1996-06-06T04:00:00Z
Registrar Registration Expiration Date: 2024-06-05T04:00:00Z
Registrar: Name.com, Inc.
Registrar IANA ID: 625
Reseller:
Domain Status: clientTransferProhibited https://www.icann.org/epp#clientTransferProhibited
Registry Registrant ID: Not Available From Registry
Registrant Name: John Viega
Registrant Organization:
Registrant Street: 226 Union St
Registrant City: Brooklyn
Registrant State/Province: NY
Registrant Postal Code: 11231
Registrant Country: US
Registrant Phone: Non-Public Data
Registrant Email: https://www.name.com/contact-domain-whois/list.org/registrant
Registry Admin ID: Not Available From Registry
Admin Name: John Viega
Admin Organization:
Admin Street: 226 Union St
Admin City: Brooklyn
Admin State/Province: NY
Admin Postal Code: 11231
Admin Country: US
Admin Phone: Non-Public Data
Admin Email: https://www.name.com/contact-domain-whois/list.org/admin
Registry Tech ID: Not Available From Registry
Tech Name: John Viega
Tech Organization:
Tech Street: 226 Union St
Tech City: Brooklyn
Tech State/Province: NY
Tech Postal Code: 11231
Tech Country: US
Tech Phone: Non-Public Data
Tech Email: https://www.name.com/contact-domain-whois/list.org/tech
Name Server: ns1ntw.name.com
Name Server: ns2dhj.name.com
Name Server: ns3bgq.name.com
Name Server: ns4fmw.name.com
DNSSEC: unSigned
Registrar Abuse Contact Email: abuse@name.com
Registrar Abuse Contact Phone: +1.7203101849
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
>>> Last update of WHOIS database: 2020-12-27T21:12:27Z <<<

For more information on Whois status codes, please visit https://icann.org/epp


The data in the Name.com, Inc. WHOIS database is provided by Name.com, Inc. for information purposes, and to assist persons in obtaining information about or related to a domain name registration record. Name.com, Inc. does not guarantee its accuracy. Users accessing the Name.com, Inc. WHOIS service agree to use the data only for lawful purposes, and under no circumstances may this data be used to: a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the registrar's own existing customers and b) enable high volume, automated, electronic processes that send queries or data to the systems of Name.com, Inc., except as reasonably necessary to register domain names or modify existing registrations. When using the Name.com, Inc. WHOIS service, please consider the following: the WHOIS service is not a replacement for standard EPP commands to the SRS service. WHOIS is not considered authoritative for registered domain objects. The WHOIS service may be scheduled for downtime during production or OT&E maintenance periods. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Access to non-public data may be provided, upon request, where it can be reasonably confirmed that the requester holds a specific legitimate interest and a proper legal basis, for accessing the withheld data. Access to this data can be requested by submitting a request via the form found at https://www.name.com/layered-access-request . Name.com, Inc. reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.



Nameservers

Name IP Address
ns1ntw.name.com 163.114.216.17
ns2dhj.name.com 163.114.216.49
ns3bgq.name.com 163.114.217.17
ns4fmw.name.com 163.114.217.49
Related

Subdomains

Similar Sites

Domain Valuation Snoop Score
$2,232 USD 1/5
$1,269,108 USD 4/5
$757 USD 1/5
0/5
$50,476 USD 3/5

Organic Search (US) Competitors

Backlink Competitors

Sites with the same domain name

Domain Valuation Snoop Score
$1,046 USD
0/5
$10 USD
$578 USD 2/5

Sites hosted on the same IP address