Firefox Sidebar.revamp Jun 2026

The current Firefox sidebar, also known as the "sidebar" or " bookmarks sidebar," offers a vertical panel that can be toggled open or closed. It primarily displays bookmarks, although some add-ons can modify its behavior. While it provides quick access to bookmarks, its functionality and design have remained relatively unchanged over the years.

Note: If you want the specifically, you may also need to toggle sidebar.verticalTabs to true in about:config .

Users can move their tabs from the top horizontal bar to the side. This layout is particularly useful for widescreen monitors and makes it easier to scan large numbers of open pages. firefox sidebar.revamp

To ensure a successful revamp of the Firefox sidebar, the following high-level roadmap is proposed:

The revamp was met with mixed but generally positive feedback: The current Firefox sidebar, also known as the

Navigate to Settings > General > Browser Layout and check or uncheck Show sidebar .

Instead of dedicated icons for every single feature, the top of the sidebar now features a dropdown menu. This allows you to quickly switch between: Note: If you want the specifically, you may

If the options are missing or you want to force the classic look, you can use the internal configuration editor: Type about:config in the address bar and press Enter. Search for .

This feature is currently in (as of mid-2026) and represents the most significant UI change to Firefox's chrome since Proton.