Custom Firefox colors

firefox_colors.md

A quick guide on color-coding multiple Firefox profiles.

1. Open about:config and set toolkit.legacyUserProfileCustomizations.stylesheets to True.
2. Within the Firefox profile directory, create a new directory named chrome.
3. Within the chrome directory, create userChrome.css with the following content:

#tabbrowser-tabs {
    background-color: $COLOR !important;
}

4. To color tabs as well, add:

/* Active tab background */
.tab-background {
    background-color: $COLOR !important;
}

/* Inactive tab */
.tabbrowser-tab:not([selected]) {
    color: #f7f7f7 !important;
}

5. Close and restart Firefox.