There is this extension that does what you want, so that last statement isn't really true. I'm pretty sure I have seen other similar ones too. Not really anything if you want to do it without extensions though.
OP is using Tree Style Tab (I spotted the icon on his screenshot), but there are alternatives such as Sidebery.
>The tab system is also not as impractical as many think
I think that OP didn't mean they're against tabs in general, but rather for using an extension like Tree Style Tab or Sidebery.
I'd recommend checking out Sidebery! I found it to be very useful for my purposes. If you are missing any features, create an issue on its GitHub page. The developer is quite active.
Seconded. I used TST for years and delayed upgrading Firefox until it was well-supported as a web extension. Then I found Sidebery and switched after less than a day.
Pale Moon features the good ol' sidebar.
There are add-ons for Firefox: - Sideberry which provides tabs tree and bookmarks in a sidebar, - Side View, which allows you to open any web page in a sidebar.
Oh I didn't know this sidebery. How is it related to the multi account container extension, do they have an integration?
Also, is there a comparison somewhere between sidebery and tree style tab?
This is a great list, one thing worth calling out is that I actually prefer SideBerry to Tree Style Tabs these days. TST is a great addon but SideBerry is essentially TST written in a modern framework with a more rich feature set and with more customization. Worth checking out at least.
I don't know how to make this happen; but I use Tree Style Tab or Sideberry in combination with full screen to maximize vertical space while keeping tabs visible.
Another handy option is Vimium. It has a tab switching feature that pops up a fuzzy finder input in the center of the screen where you can see your tabs listed as completion suggestions even while in full screen. So that's another way to get some visual feedback on which tabs are open. Fuzzy finding is a different take on tab switching that doesn't work for everyone - but it is very fast!
> I don't like how more than 10 tabs makes it very hard to navigate between them because the title of the tab becomes very small and the favicon is small already.
Just so you know, you can fix this in Firefox by visiting about:config and setting browser.tabs.tabMinWidth
to any number you want (the unit is pixels). I use 200
for example. Firefox also supports the sidebar API for extensions, allowing extensions like Sideberry to offer vertical tabs as well.
It's possible but you're gonna have to mess around with userChrome.css. Instructions can be found [here on the Sidebery wiki](https://github.com/mbnuqw/sidebery/wiki/Firefox-Styles-Snippets-(via-userChrome.css\)), and I think there are instructions for this in the Tree Style Tabs wiki too.
If you like user friendly customization, I recommend Sidebery over Tree Style Tabs. I also find it a lot more stable over-all.
You could also try Sidebery, I prefer it over Tree Style Tabs and Simple Tab Groups
> What I want is to be able to scroll though unclassified bookmarks, select more than one, and move them all to a specified folder.
Sidebery's bookmark tab can do this (It's the one on the very left).
> Tab Center Reborn
Any benefits to this over Sidebery or Tree Style Tab?
I can recommend Sidebery It replaced Tree Style Tab for me and has many additional functions including proxy, container and user agent support.
sidebery is love, sidebery is life https://i.imgur.com/bapju0r.png
Try Sidebery. It lives in a sidebar and has a panels feature that lets you group tabs in trees and then group the trees in different panels. It also integrates with Containers.
I loved the original Tab Groups/Panorama feature but I think Sidebery has been even better for me.
Try Sidebery. I was a die-hard Tree Style Tabs user and switched to Sidebery a day after finding it.
The aesthetics are 10x better than Tree Style Tabs, it’s less buggy and laggy, and it has native support for multiple tab selection. And the dev is incredibly responsive on github, and is very open to suggestions on how to improve Sidebery or close bugs.
This is an awesome design, no doubt. But you don't really need Opera for that functionality.
The Firefox extension Sidebery implements contextual identities in a way that is almost identical to the workspaces feature in Opera, with the added benefit of providing superior separation for privacy.
There's also Sideberry, which is better in some ways than TreeStyleTab.
I'm personally waiting for there to be a significant difference before I fully switch, though.
Also worth mentioning Tree Style Tab and Sidebery
This capacity of Firefox to have the tabs on the side as a hierarchy is the single feature that has keept it my main browser even through the dark days.
Chrome never did it properly and Edge wouldn't allow add-ons to have the sidebar on the left.
I first used this feature in the old Opera now nearly two decades ago, simply cannot live without it.
Some work has begun toward adding this feature directly into Mozilla's extension, though I don't know if the developer is still engaged.
The Sideberry extension claims to be able to do it already, though I haven't tested it.
If every tab is its own container, and ever container has its own proxy settings, you can use https://addons.mozilla.org/en-US/firefox/addon/sidebery/
There are a lot of proxy add-ons available, but you have a pretty specific use case, so I would recommend you search a bit more.