[fbcpck]

> its performance leaves a lot to be desired

I'm not sure what you're talking about; this may be the case several times in the past, but you should check again because this is a thing that constantly changes. Firefox performance today doesn't really leave a lot to be desired IMO

> Microsoft Edge got a decent native vertical tab solution before Firefox did! Edge!

Tree Style Tabs has been around since like… 2007?. Or does the "native" part somehow make it a whole lot better?

[EMM_386]

> Firefox performance today doesn't really leave a lot to be desired IMO

Sadly I recently left Firefox after having used it for 20 years (Phoenix/Firebird days).

The performance degradation was becoming too noticeable. I switched to Brave (of all things), but that's only because I could no longer fight the real performance that a Chromium-based browser has.

I hate doing this, because the last thing I want is a browser engine monopoly. That's why I started using Firefox in the first place, to help get rid of IE.

[npteljes]

I often find sites with subpar performance in Firefox. I think that it's the sites' fault though, for testing only in Chrome / Safari. Reddit's redesign is an example, the loading, scrolling, post opening experience is slow and I can see that it eats a lot of CPU. In chrome it's much faster on the same machine.

[jjcon]

For me at least Firefox is a no go on every laptop I’ve worked on - the fans start spinning up and I start losing battery life really quickly (especially on macs). Works fine on my desktops though.

[tapoxi]

Tree Style Tabs has been pretty limited since the port to WebExtensions. It can no longer take the place of the existing tab bar, and instead sits alongside it unless you do some Firefox profile CSS trickery that I never got working properly. Mozilla was considering adding a "hide tab bar" feature but I think they abandoned that.