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Aubrey Portwood
Aubrey Portwood

Posted on • Updated on

How to get better tabs in Firefox UI (on Mac)

Yes, the tabs in Firefox suck, they look like pills (or buttons) and look horrible, right?

This is how I styled them to look a little more visually pleasing:

Gif of how the tabs look with the below styles

Screenshot of a few tabs.

Edit /Users/<username>/Library/Application Support/Firefox/Profiles/<your profile>/chrome/userChrome.css and add the following:

Note, you should know where this file is. If you don't, Google it and come back here.

.tab-background {
    border-radius: 0 0 3px 3px !important;
    border-top-right-radius: 0 !important;
    border-top-left-radius: 0 !important;
    margin-right: 0 !important;
    margin-left: 0 !important;
    margin-bottom: 0 !important;
    margin-top: 0 !important;

.tabbrowser-tab:not( [selected=true] ):not( [multiselected=true] ) .tab-background {
    background-color: color-mix( in srgb, currentColor 10%, transparent);
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I am using this theme, curious how this looks in other themes.

Also, please let me know how this works on Windowz!

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