Add the tab sidebar feature and automatically hide the top tab bar.

[某科学的群玉阁]

Add the tab sidebar feature and automatically hide the top tab bar.
The tab sidebar supports permalinks and opens in a small window

[Jon]

Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.

[LeonHard]

I've been waiting for years for Mozilla to allow users to hide the tab bar.

It would be nice to have a built-in tab-side-bar but allowing us to hide the tab-bar most definitely should be a must. There already are add-ons like Sibery that provide a great side-bar experience.

[Herfen]

You're not alone. TRhere's a whole Community around vertical, auto-or button hidden Tabbars:

https://bugzilla.mozilla.org/show_bug.cgi?id=1332447

https://www.reddit.com/r/FirefoxCSS/comments/oljbzr/toggle_tabbar_visibility_with_alt_continued/

[Herfen]

Oh I see something similar is voted here:

https://connect.mozilla.org/t5/ideas/native-vertical-tabs/idi-p/85/page/20#comments