Please work on tab grouping instead!

I really hope you can turn this off

Here I'm still waiting for an official vertical tabs feature.

If this defaults to on, I’m turning it off.

Tab. Groups.

This is not even close to the worst thing they have ever done, but stuff like this is a waste of resources. People mostly want official vertical tabs and more than anything engine performance improvements. (and the ability to pretend to be Chrome in Youtube)

In current versions of Firefox you hover your mouse over a non-active tab [...] to see (after a small delay) a tooltip containing the web page title.

Uh... what is the point of that? If I am looking for a specific tab then:

• I probably want to switch to the tab that I am looking for, so staying on the current one is not required
• if there are a few tabs from different pages from the same domain the difference might be hard to see on a thumbnail (similar page headings with logos)
• and most importantly: opening the tab is faster than waiting for the delay anyway

This sounds like a "cool" feature that's looking for an actual problem to solve.

This is quite useful, especially for those sites without meaningful or distinctive names.

This was already a thing for ages until they killed it, but it is still possible if you are okay with tweaking userChrome.css

Why Mozilla wastes resources on their own implementation instead of providing API's to third party developers is beyond me.

I miss the days with Opera. Not only could it group tabs, but it had previews too. Mouse gestures. Keyword searches. Page link filters and batch operations. RSS-reader. Chrome didn't even exist back then, and IE and Firefox are still playing catch up. Kinda amazing to think about it.

Vivaldi is the spiritual successor, but having to use chromium rendering engine, it's so many concessions and steps back. Has the mouse gestures, tho.

I think many people in the comments suffer from some version of curse of knowledge.

Sure, this feature us quite irrelevant for a power user who is quick to navigate the browser and needs a split second to remember what tab it is simply by reading the header and seeing the icon.

However, many less proficient people can benefit from this feature. Not once I saw how someone who has 10 tabs open and needs to go to a different webpage, starts meticulously clicking through every single one of them because they have no idea how the page they are looking for is called, they are too overwhelmed by using web as a whole to take notice.

Have they ever said if vertical-tabs is a feature they will add? Vivaldi and Edge both support it by default and it's awesome.

1000ms delay seems to be little too much to my liking, changed browser.tabs.cardPreview.delayMs to 500 and it feels much better.

Preview is pretty short for some reason, it might be related to my monitor (32:9) aspect ratio?

Nice! I remember using an extension for that back in the day

I love tab previews, but I would hate to give up vertical tabs for it. If they would implement vertical tabs + previews, I for one would be happy.

Anyone know a way to mimic Brave vertical tabs with preview? I can get close, but without preview images and that's what I'm after.

"We're super excited to announce that we're working on a feature that has been requested by no one ever".

Yeah I always turn off that previi crap immediately as it usually gets in my way of doing things. Please don't even spend time on this feature, I don't really see the use

I want to view multiple tabs at once, in a split-page view where I can scroll on one tab, then mouse-over to another and start independently scrolling on that one. It's probably the key feature I miss from Vivaldi. Is there some insurmountable obstacle in the engine that prevents implementation, or is it stubborn devs?