While Firefox is running, go to about:support and find a Profile folder row near the top - there should also be a button labeled 'Open folder' next to it. Setting up files Find the profile folderįirst, find your profile folder.

Go to about:config and set the pref to trueĪfter you set this pref, Firefox will try to load userChrome.css and userContent.css - but those files don't exist yet so now let's create them. The setup is quite straightforward with the exception of how to find the profile folder so pay attention to that. Doing so requires setting a specific preference (see below) and then creating those files inside your Firefox user profile.

SetupĪs an overview, you will make Firefox load two special stylesheets - userChrome.css and userContent.css. Most of them should also work on OSX and Windows7, but there may be wrong behavior especially when native widgets such as window titlebar or window control buttons are being styled. Stylesheets in this repository are tested only on Windows 10 and to a lesser amount on Linux.

In the case that a particular style relies on another style, the fact will be noted at the start of the file that requires so. These stylesheets are mostly self-contained and can be mixed with each other somewhat freely, but there are no promises about compatibility with third-party styles.

This repository contains various styles to modify appearance of Mozilla Firefox. Collection of random CSS hacks for Firefox

Firefox css style editor