Custom Style

Custom Style

Very light-weight prototype add-on to apply custom CSS styling to websites.

What is Custom Style?

Custom Style is a very lightweight prototype add-on for Firefox that allows users to inject CSS and apply custom styling to websites. It can hide annoying elements and make them scroll away as you scroll. Use the Options page to add rules and decorate the page as you want. Enhance your browsing experience with Custom Style!

Stats date:
By: cywu
Users: 10
Rating: 4.33 (3)
Version: 0.4 (Last updated: 2019-05-31)
Creation date: 2019-05-09
Weekly download count: 2
Firefox on Android: Yes
Manifest version: 2
  • <all_urls>
  • tabs
  • storage
Size: 12.26K
URLs: Website
Risk impact: High risk impact
Risk likelihood: Low risk likelihood

Other platforms

Not available on Chrome
Not available on Edge

Very light-weight add-on to inject CSS to decorate the page as you want. It can hide annoying elements like fixed headers or make them scroll away as you scroll. No rules are included by default. Go to the Options page from the add-on manager and add rules. Example: On site, set rule: body{border: 5px solid yellow !important;}. If you plan to hide elements on a page, you probably should consider Ublock Origin instead.

User reviews
Thanks for the tip to right click on the 'Add to Firefox' button, for downloading the code to view before installing!! It works great! {visibility: hidden !important;} is a great way to get rid of junk. Just don't make the mistake of putting 2 separate entries for the same web site. If you put in the settings in 2 locations it won't work. I wish Mozilla would have let me know that this had been replied to. I would have responded sooner.
by Wayne Sallee, 2020-04-17

Просто и лаконично. Правда не сразу понял, что в настройках именно плагина нужно вносить свои параметры CSS. Разобрался - работает! :-)

A better look for hostname (css name) & css hidden until i double click or edit would be better so we could have css's line by line..
by delicacy, 2019-07-24
View all user reviews
Risk impact

Custom Style is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Custom Style if you trust the publisher.

Risk likelihood

Custom Style has earned a fairly good reputation and likely can be trusted.

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