Could you share your use case for this? The odd time I've benefited from viewing multiple tabs at once, I just split them to two windows and resize them. I'm guessing this is just faster?
this post was submitted on 26 Jan 2026
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Something I wanted this for a while ago: quickly and easily displaying two tabs during a single window share on a zoom call, if displaying two things to compare or when running a planning meeting.
I'm not a Firefox user but I use split tabs often in Vivaldi when I need to manually enter data from one system into another system. Splitting the tabs instead of dragging one into a separate window keeps all the tabs contained in the same tab workspace. I have several workspaces and I don't want to accidentally lose an important tab because I dragged it out into its own window and forgot to drag it back.
edit: typo
This! And, often it means less "chrome", (eg title bars or side panels or whatever) getting in the way.
It's not a use all the time thing, but instead a tool that is just really handy.
Network admin stuff when you need to monitor a bunch of devices, security feeds across cameras (especially when they don't combine into a single PVR system) and more.
I have had people report it as a bug for a web application on Edge. I too don't see a use for it still.
It can also be enabled in beta with browser.tabs.splitView.enabled to true.
I find the tab note function (browser.tabs.notes.enabled to true) very useful as well.
browser.tabs.splitView.enabled oh wow thanks. This works so well, its implemented way better than when I was using the feature in edge
tbh i’m more excited about the rounded corners.
can finally scrap my chroma.css :)
Just waiting for a way to show-on-hover the address bar (i.e. the logical companion to vertical tabs) then I can finally scrap my chrome.css
I guess it's cool? Zen browser has had this for over a year though