After a recent Firefox update, a sidebar shows up and allows vertical browser tabs. How this looks and how to revert to horizontal tabs.
I know this is old news by now, but I was not sure how to activate vertical tabs on all of my browsers. It certainly is not obvious, so I wanted to include the instructions here in case anyone else wants to try it out.
Type about:config into the address bar of Firefox. You'll be greeted with a warning that you are accessing advanced settings - click "Accept the Risk and Continue." Search for the boolean preference sidebar.verticalTabs and set to true. That's it! Enjoy your vertical Tabs!
Edit: You may also need to set sidebar.revamp to true if it is not already/automatically set.
I like it better than the horizontal tabs, but it's still got nothing on the Tree Style Tabs extension. With that you can group tabs together, collapse trees, close trees, etc. Makes it much easier to keep things organized
They take up the mostly-unused horizontal screen space, though, whereas the vertical space that it frees up is far more precious to me. And I get to see most of the tab titles as a bonus!
I usually keep it in the "icon" view which is pretty space efficient. When you activate the vertical tabs, it also generates a toggle at the top of the window that lets you expand the tabs. I find it is better on smaller screens than the standard horizontal tabs personally.
Ctrl n is just new tab isn't it? Honesty in the browser tab grouping isn't as critical to me. On my phone where I open too many tabs it would be nice to group them so my random ADHD lookups are grouped together.
Sideberry is good, but you end up with tabs in both places. This option allows you to reclaim the vertical space without need for messing with the chrome css stuff.
They really should have a browser that can have side by side sites so I don't have to keep doing that in the OS. Maybe I should just invent one. I don't know about anyone else but almost all of my workflows at this point are one side reference material and the other side what I'm working on.
There is a very good addon that does this.
Tiles WE
It toggles splitting your browser in 2/3/4/6 windows tiled, or custom layouts.
Also fancyzone and altsnap are great tiling manager
https://addons.mozilla.org/en-GB/firefox/addon/tile-tabs-we/