Custom Firefox CSS I made for myself. Feel free to use or modify it ¯\(ツ)/¯

Currently under update. Download/clone the pre-refactor release to get the results below.

Preview:

• Bookmarks toolbar is displayed as a sidebar on the left. Left-click or middle-mouse-click to use the elements. If the list is too long, use the mouse wheel to scroll. Ctrl+Shift+B toggles it by default.
• The X buttons that close the tabs are removed. Use middle-mouse-click instead.
• Remodeled NewTab shortcuts and the ability to add custom background image.
• Remodeled about: tabs.
• Most UI elements are modified to be a lot smaller.
• ...

• Follow the How to enable custom CSS for Firefox?
• Make sure to use horizontal tabs and not vertical tabs.
• Use the default light theme.
• Right-click anywhere on the UI and click Customize Toolbar. Place the Bookmarks toolbar items element into the left toolbar by dragging.

• Open FireFox settings and navigate to Home. Change your settings to match the image below.

• Navigate to about:config.
• Search for toolkit.legacyUserProfileCustomizations.stylesheets.
• Set the value to true.
• Navigate to about:profiles.
• Find the profile that is in use, and click Open Folder on its Root Directory.
• Create a folder named chrome.
• Copy the repository files into the chrome folder.
• Restart Firefox.

• I put basic settings like color, size, and similar values that I thought I might want to change in the future into the variables.css file. You can modify them from there.

• This is a personal project, so it isn't tested thoroughly.
• Only made for Windows. I don't know how it looks like on other OS.