To enable vertical tabs in Firefox, just right-click on any empty area of the horizontal tab bar. If you've run out of space, ...

A quick restart of Firefox showed the new icon. Let us know your other Firefox tweaks in the comments! Update: [Colby] pointed out that this type of CSS change should be made in the “userChrome ...

The new Mozilla Firefox 136 release delivers a number of notable new features—features Mozilla may be hoping help it re-earn ...