See Mozilla here and here, for example, on tab coloring. Mozilla Firefox or simply Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation.Firefox uses the Gecko rendering engine to display web pages, which implements current and anticipated web standards. The style sheet code is easy to understand by inspection, and mistakes do no harm - just remove them and restart Firefox. tab-content įeel free to modify the appearance to your taste. (If you're editing an existing userChrome.css and the line exists, there's no need to duplicate it.)Ĭlose and restart Firefox to see the new tab style. with Notepad, Notepad++, or other text editor.Ĭopy and paste text below and save the file. If there is no file userChrome.css in that folder, create it as a text document, i.e. Mac OS, Users//Library/Application Support/Firefox/Profiles/fault.
In the example below, inactive tabs are uniformly gray, the active tab is a gradient ascending from red to green, and the tab over which the cursor hovers is a gradient from light to dark gray. you can easily customize many aspects of Firefox.
