Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of HTML, CSS, JS Validator

HTML, CSS, JS Validator by Martin Sullivan

The utility checks and fixes HTML, CSS, and JavaScript errors on websites.

1 (1 reviews)1 (1 reviews)
1 User1 User
You’ll need Firefox to use this extension
Download Firefox and get the extension
Download file

Extension Metadata

About this extension
The utility checks and fixes HTML, CSS, and JavaScript errors on websites.Upgraded function: Display detailed errors in popup interface, Automatically fix some common errors, Create error reports, Suggested fixes
Rated 1 by 1 reviewer
Sign in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
1
Read 1 review
Permissions and dataLearn more

Required permissions:

  • Access browser activity during navigation
  • Access your data for all websites
More information
Version
1.0
Size
15.19 KB
Last updated
a year ago (Sep 10, 2024)
Related Categories
  • Web Development
  • Search Tools
  • Tabs
License
Mozilla Public License 2.0
Version History
  • See all versions
Add to collection
Report this add-on
More extensions by Martin Sullivan
  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

Go to Mozilla’s homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.