A great power of Firefox are its add-ons, aren't they? Sidebery [1] has been a solid implementation of vertical tabs since a long time ago. Begore that got popular, Tree Style Tabs [2] was also a very comprehensive solution.
But nowadays, vertical tabs are native since Firefox v136 [3][4], so at least for the basics you won't need an add-on.
Not yet but it's in development (I'm a product designer at Brave). We're working through other issues with vertical tabs before we continue work on this :)
Not yet but it's in development (I'm a product designer at Brave). We're working through other issues with vertical tabs before we continue work on this :)
https://github.com/brave/brave-browser/issues/44345
Yes. They are weaker, but Manifest v3 has been tweaked a good bit since the very initial announcements, and people have figured out ways to compress old-format blocklists into Manifest v3 compatible rulesets that can remain surprisingly extensive. They are weaker than v2 blockers or Brave Shields, without a doubt, but they do still do a decent job.
But nowadays, vertical tabs are native since Firefox v136 [3][4], so at least for the basics you won't need an add-on.
[1]: https://addons.mozilla.org/firefox/addon/sidebery/
[2]: https://addons.mozilla.org/firefox/addon/tree-style-tab/
[3]: https://news.ycombinator.com/item?id=41192118
[4]: https://news.ycombinator.com/item?id=43254871