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26 June 24, 08:46
Quote:It is no secret that Mozilla is working on bringing vertical tabs to Firefox. The organization confirmed the plan back in May after a test version of Firefox leaked that supported the functionality already.
Now, Mozilla has added the functionality in Firefox Nightly. This is the cutting edge development version of the Firefox web browser. Most features are added to Nightly first before they make their way into Beta and then Release versions of the web browser.
Note: features may change during development and some may even be pulled before they reach the stable version of the Firefox web browser. This is a first look at the feature as it stands right now.
Vertical tabs in Firefox
![[Image: firefox-vertical-tabs.png]](https://www.ghacks.net/wp-content/uploads/2024/06/firefox-vertical-tabs.png)
Once enabled, tabs are moved to the side. Firefox already supports displaying them on the left or right side. Tabs are displayed with their icons only by default, but you can expand the sidebar to display the first few characters of the website title as well.
These tabs have no hierarchy right now, which means that they are all displayed on the same level. The classic Tree Style Tabs extension for Firefox supported hierarchies, which showed relations between tabs. Yes, we reviewed it here in 2009 for the first time. It was turned into a WebExtension when Mozilla switched off the classic Firefox extensions system in favor of Chromium's WebExtensions system.
What you can do already is move tabs around and use other tab-related features, such as pinning. This works well already for the most part, but the introduction of tab groups will certainly add a new dimension to this. While you can drag & drop tabs in the horizontal tab bar as well, less tabs are shown at the same time by default on most systems.
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