>I'm really puzzled by the UI, you have to drag and drop a tab onto another to create a tab group.

You can also use Right Click->Add Tab To Group

This is what I use as the pull tabs together is very bad UI. It's to easy to move the tab instead and / or open a new window. Hope this improves with time.

Thanks for the right click, I don't know how I missed it the first time I looked...

Do you know how do you move a tab group once created?

Right click has a menu manage but only option is to create a new window with the tab group. Drag and drop doesn't to work on the tab group (to reorder it vs other groups and tabs).

> Do you know how do you move a tab group once created?

It should work once you've updated to Firefox 138.

It does thanks!

FWIW, that was also my experience when Edge added this feature. It was particularly annoying as I did not ever want to use the feature. I guess Firefox wanted to be bug-for-bug compatible? :(

In about:config, try looking for browser.tabs.dragDrop. The createGroup... and moveOverThresholdPercent flags control the group creation behavior during drag and drop. If anyone finds values that make it less likely to accidentally create groups while still allowing intentional grouping via drag and drop, I can channel these back to the team.

I'm guessing your telemetry will tell you a lot of users have started using tab groups. They may have done so by mistake. My tabs each take up like half an inch of the screen and I don't have a gaming mouse; I now have multiple tab groups which I never intended making. As this is a quite technical feature, maybe dragging should be off by default, or only when e.g. holding shift and dragging or something?

(Yes it's a beautiful feature and probably lots of people want it, just noting that the dragging is confusing. I can't think of a good way to solve the problem that doesn't make it slightly more difficult/nerdy to use.)

Is there a way to disable the creation of tab group by drag and drop altogether by tweaking these parameters ?

Also I noticed another thing: drag and droping a tab on a folded tab group doesn't work. You have to unfold the tab group then you can drag and drop a tab into it.

It would be great to allow drag and drop of a tab on a folded tab group and if dropped just put the tab at the end of the group, it would make the tab group feature more useful by allowing to quickly select and drop tabs where they should go.

You could just set `browser.tabs.dragDrop.createGroup.delayMS` to a high value like 3000; that would mean having to rest the mouse for three seconds to group tabs during drag and drop.

With the horizontal tab layout, you can drag-and-drop the group name to move the whole group, same as singular tab. Although the first time I tried it it didn't work, now that I keep trying with different click timing etc it seems reliable - not sure if there's maybe a drag handling bug hiding in there somewhere.

We've implemented drag and drop of groups for both horizontal and vertical in 138 which presumably you were updated to today :)

I've only enabled tab groups on my profile after updating to 138 today. That first attempt where drag-and-drop didn't work was already on 138. But I can't reproduce it anymore, so I assume that was a fluke. Looks good so far!