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This is the most elite tab management tool, hands down

I recommend this extension! It is basically equivalent to MS Edge Vertical Tabs.

Love it - Mellowtel

works well, i can now see my tabs in full screen without having to move my mouse all the way up.

works as expected.

there's a youtube video by EasyOSX where he explains how to hide the Top Bar so. I recommend watching that short video if you want to only have the sidebar showing and hide the top completely.

Hoping firefox natively adds this feature soon!

As a person habitually having 829 open tabs I have found this invaluable to quickly get my tab-mania under control. Love.