It is a file / folder that, when enabled, allow a user to customize the interface of Firefox.
For example, I use tree style tabs, so my tabs are on the right. To remove the standard tab bar, I used the userChrome.css.
/* hides the native tabs */ #TabsToolbar { visibility: collapse !important; } #sidebar-header { visibility: collapse !important; }
yes, you can.
It is a file / folder that, when enabled, allow a user to customize the interface of Firefox.
For example, I use tree style tabs, so my tabs are on the right. To remove the standard tab bar, I used the userChrome.css.