Sidebar Tab Groups

It's an addon for Firefox. Using it you can manage your tabs via tab groups in sidebar.

I was inspired by Opera GX sidebar and wanted something similar in Firefox

How to make it pretty

Default sidebar is too big. So to make it tiny like icon width you need:

Create userChrome.css

• Open about:support in Firefox
• Open profile folder
• Create chrome folder
• Create userChrome.css inside it
• Put the code inside the file:

/* Hide the default Firefox sidebar header */
#sidebar-header {
    display: none !important;
}

/* Adjust the minimum width of the sidebar */
#sidebar-box {
    min-width: 37px !important; /* Set your desired minimum width */
    max-width: 37px !important; /* Set your desired maximum width */
}

/* Set a specific width for the sidebar */
#sidebar {
    width: 37px !important; /* Set your desired width */
}

Turn the style on

• Open about:config in Firefox
• Type userprof in the search bar
• Double-click on toolkit.legacyUserProfileCustomizations.stylesheets to switch it on
• Restart Firefox