Firefox One Line

firefox When using Firefox, the browser is made up of 3 columns, which means there is less space on the page than the browser window. Such a thing usually does not happen in new modern designs. We can make changes to the interface of the browser by creating its own css fill in Firefox. You need to create a folder and a file to make adjustments on your computer.

If you are using Windows you will have a folder named “%appdata%\Mozilla\Firefox\Profiles\XXXXXXXXX.default”.

If you are using Linux you need to have a similar folder “.mozilla/firefox/XXXXXXXXX.default”.

This “xxxx” section has your profile number. This folder contains the following files and folders

ahmet@workstation:~/.mozilla/firefox/9204xyk2.default$ ls
addons.json              lock
addonStartup.json.lz4    logins.json
AlternateServices.txt    minidumps
blocklists               notificationstore.json
blocklist.xml            permissions.sqlite
bookmarkbackups          pkcs11.txt
browser-extension-data   places.sqlite
cert9.db                 places.sqlite-shm

In this folder, create a folder called chrome. Create the userChrome.css file inside the Chrome folder and place the following code in it.

Uncheck the Title bar in the Firefox customization options. This option is located at the bottom left of the customization page.

When you close and reopen Firefox, you’ll see a new look.

To make the background of the new tab page the background we like on, we create the userContent.css file and place it in the following css code.

You can access files on and if you have an improvement, feel free to open a pull request.

Update 2020

To use these customization, please set true toolkit.legacyUserProfileCustomizations.stylesheet option under about:config page. (You can reach this config by search at top on about:config page)

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