Html Validator

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon For Firefox 56, use 0.974 (see all versions below). For Firefox 57, see Web Extensions.

HTML Validator - Enhance Browsing Experience with HTML Validation

'Html Validator' is a Mozilla extension that implements HTML validation in Firefox and Mozilla. It scrutinizes HTML pages for errors and displays the count directly on the icon in the status bar. It validates HTML sent from the server as well as in the memory post Ajax execution. It offers important features such as accessibility checks based on WAI levels and also supports HTML 5 validation using W3 Online validator. Additionally, it offers various language translations for augmented user experience.

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View on Firefox Browser Add-ons

Add-on stats

By: Marc Gueury

Daily users: 8,206

Rating: 4.29

(28)

Version: 0.9.9.5 (Last updated: 2021-08-04)

Version code: 5275583

Creation date: 2004-09-11

Weekly download count: 84

Firefox on Android: No

Risk:

Permissions:

<all_urls>
storage
clipboardWrite
webNavigation

Size: 2.78M

URLs: Website

Full description: See detailed description

Ranking

# 886 ▲ 5

Other rankings

#90 in Web Development

#147 in Other extensions ▲ 2

#1 in html keyword 37

#19 in algorithm keyword 2

#31 in error keyword 19 ▲ 1

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Other platforms

Not available on Chrome

Not available on Android

Not available on Edge

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Helps catch errors in HTML easily
A must-have for serious HTML learners
Has been a tool for many users for years
Working again after a clean install of Firefox

Cons

Does not support CSS HTML Validator any longer
Validation of frames is no longer possible
Requires an extra click to access Validator in DevTools
Shows false warnings during offline validation
Options are partially broken in recent Firefox versions

Most mentioned

Need for more features or recovery of lost features
Complaints about false errors and issues when going back to previous pages
Expectation of keyboard shortcuts for easier access
Gradual decline in support and performance across Firefox and Chrome versions

User reviews

by 远离中共邪教快退出党团队, 2025-02-13

this add is good

by Firefox user 18476000, 2024-07-02

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Add-on safety

Risk impact

Html Validator requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Html Validator has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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