Firefox: Vertical tabs are moving into the nightly versions

One of the most requested features for Firefox are vertical tabs. The developers are now delivering these in the nightly builds.

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Firefox Nightly Build with vertical tabs

(Image: Screenshot / dmk)

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This article was originally published in German and has been automatically translated.

The Firefox developers have now added support for vertical tabs to the test versions, known as nightly builds. This was one of the most frequently requested features. The function can be set in just a few simple steps.

The about:config web page provides the setting options in Firefox Nightly for activating the vertical tabs.

(Image: Screenshot / dmk)

Vertical tabs were the third most requested feature on Firefox's list of ideas. At the end of May, a Mozilla community manager announced that the developers were working on vertical tabs, among other things. The site Windowsreport has now discovered that vertical tabs are available in the nightly builds of Firefox and can be tested.

First of all, interested parties must of course download and install the nightly version of Firefox. This can also be done alongside the stable Firefox, the icon is clearly different, it is blue in color, and also lands in its own directory. It is available for download on the Mozilla website a little further down.

Once the browser has been started, the settings must now be called up with the URL about:config and the warning to proceed with caution must be confirmed ("Proceed with Caution"). By searching for sidebar. the available setting options appear. By clicking on the symbol with the two opposing arrows to the right of the two lower options sidebar.revamp and sidebar.verticalTab that appear, the settings can be set to true. After a browser restart, the tabs are then stacked vertically on top of each other on the left in the sidebar.

The sidebar is initially collapsed, making it difficult to see the tabs. However, a button in the toolbar with the title "Show sidebars" expands them so that more can be seen. The developers have not yet implemented a tab hierarchy. Whether and when this function will end up in the stable Firefox versions remains to be seen.

Mozilla still has some functions in development for Firefox. For example, it was announced earlier this week that Firefox is to receive AI support in the sidebar. Users will be free to choose which chatbot they would like to integrate. The first functions that the context menu will then provide include summarizing the selected text, translating it into simplified language, or creating a knowledge quiz on previously selected content.

(dmk)