I built a browser for this: https://cretz.github.io/doogie/. Granted I haven't uploaded the binaries for the current Chromium version (easy to do, just lazy) and I also don't support extensions and there's no macOS support yet. But the sheer productivity increase for me is substantial.
The XUL extension I miss most is Pentadactyl. Tridactyl is a pale imitation, and still immature. Qutebrowser has potential, but still lacks critical extensions like uMatrix and uBlock Origin.
(To clarify: it does have an adblocker, but it's quite basic, only based on a blacklist of hosts. You can also selectively enable JavaScript for individual domains, but not yet based on both webpage and its origin like with uMatrix)
Session Buddy and The Great Suspender. I have ~800 tabs open in Chrome right now on this PC. I haven't used Tree Style Tab, but Chrome's tab-shrinking is actually better for lots of tabs (up to a point) than Firefox's tab-scrolling. I have yet to try tab suspension extensions in Firefox, so there may be a workflow that works for me there (Chrome is not ideal).
My experience is exactly the opposite. Each time I'm past 200 tabs or something (i.e. all the time), Chrome's UI starts occasionally lagging and glitching, and I'm not even talking about memory usage (overall or even just parent process alone) and how it's affecting the operating system. Even with pre-Quantum Firefox I was always pushing limits much, much further.
However I'm avoiding media- and script-heavy websites as much as possible, and block a couple of ad networks solely because of the stress that rich media ads (videos flying all over iframes and whatnot) causes for the hardware I'm running the browser on. (I don't mind ads if they don't take 8 CPU cores to render, but they seem to be disappearing from the internet.)
That's weird. I currently have ~100 tabs open in Firefox (yes, on the same computer as 800 in Chrome), and it's fine. Back in 2008, I had ~800 tabs in Firefox on Linux for a project (with TabMixPlus); it was pretty slow and unstable, but it worked.
Lol, I usually organize tabs by location so pinning them (and minimizing their horizontal footprint) is good enough for me. Further, I personally found that when I had a million tabs open, at least 50% of them were duplicates so I just started using tab deduping extensions to cull them.
Not OP, but I currently have around 80 tabs open spread/organized over 6 different windows (and two different Chrome profiles). And a bunch more "snoozing" with OneTab.
