Amazing. I've been using it for years. This is how Firefox's built-in vertical tab's should work out of the box.

Great job. A bug:
1) open multiple tabs
2) open a private Firefox window (and use it?)
3) close the main window
4) the main windows tabs are lost/not reopened, when Firefox is next opened

Ich finde es unakzeptabel, dass Veränderungen durchgeführt werden wie z.B. heute 27.8.2026 der zusätzlichen TAB für neuen Tab und ich finde keine Möglichkeit das abzuwählen. Das Problem unserer Zeit, dass man alles vorgeschrieben bekommt. Passt leider gar nicht zu dem sonst gut funktionierenden Addon.

Best side tab extension ever lowk its so nice

あまりにも神。ありがとうございます。無いと困ります。

Eigentlich müsste diese Erweiterung von Mozilla für die senkrechten Tabs übernommen werden. Macht das Browsen sehr übersichtlich und wird extrem gut gewartet.

Excellent work by the developers. This has been part of my setup for a while now and it never lets me down.

This extension is THE reason I choose to use Firefox. No alternative browser supports opening links as child tabs.

For trying to get rid of the extra space on the sidetab, it's a firefox setting. Just go to your settings and search 'sidebar' and disable it.

5 Stars for the Add-On. I have 600-1000 tabs open most of the time and still can navigate with ease to whichever tab i want. Even on an older device it doesn't cause any performance issues.

-1 Stars for the very annoying update policy. New features are turned on by default, destroying my meticulously crafted layout. Then i have to go through every single one of the very long list of settings to see what the author changed and change it back.

A pop-up window with a warning about closing multiple tabs has stopped appearing. This setting is enabled in firefox, and I have verified it. When I exit the browser, this warning consistently appears.

Great - except that the tabs load half the time with a large X on the left (using Firefox, at least). Toggling the add-on resolves this but it's a constant nuisance.