CSS Override

Add your own custom CSS styles to any webpage

CSS Override: Custom CSS styles for webpages

'CSS Override' is a Firefox add-on that allows users to add custom CSS to any webpage. Used by toggling on/off or opening up the style editor for the current site. Once custom CSS is inputted and saved, it is implemented when custom styles are toggled on for the page. Perfect for users seeking a trustworthy, open-source alternative to Stylelish.
Download
View on Firefox Browser Add-ons

Add-on stats

Users: 1,991
-22
Rating: 4.19
(21)
Version: 1.0 (Last updated: 2019-10-08)
Creation date: 2019-10-07
Weekly download count: 58
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood:
Low risk likelihood
Manifest version: 2
Permissions:
  • activeTab
  • tabs
  • storage
  • <all_urls>
Size: 20.50K

Ranking

# 2,044 ▼ 1
Other rankings
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Other platforms

CSS Diff (v1.0)
1.90 (10) 707
CSS Editor (v1.0.310)
3.25 (296) 84,229
Not available on Edge
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Add-on summary

Analyze keywords

Tired of blindingly white web pages?

This extension allows you to add your own custom css styles to any webpage. Hit the extension icon to toggle custom styling on/ off or to open up the style editor for the site you are currently on.

Paste your custom CSS into the style editor and hit save. When you toggle custom styles on for the page your custom css should now be shown.

I made this extension after Stylish got caught doing some shady stuff and wanted to use something I could trust. This project is open source on github (see link in sidebar).

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
  • Works without any problems
  • Simple and fast
  • Effective for overriding CSS styles
  • Helps restore previous layouts on websites
Cons
  • Does not work on multiple sites, including Google
  • Stopped working for most sites recently
  • Lacks a clear user manual or hints for new users
Most mentioned
  • Mixed reports on effectiveness across different websites
  • Users appreciate the simplicity and functionality
  • Need for better documentation or hints for usage
User reviews
We cannot have an overview of all css site setup
by Firefox user 17672785, 2024-11-19
Worked. Just made the YouTube homepage back to 4 videos per row
by Firefox user 12486816, 2024-10-18
it does not work on the website I wanted and on Google either... I tried with the body { background: #000; }
by Recontact, 2024-08-29
View all user reviews

Add-on safety

Risk impact

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

Risk likelihood

CSS Override has earned a fairly good reputation and likely can be trusted.

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