[quesera]

I currently have 20,097 tabs open in one browser profile. The oldest tab appears to be an HN post from 2.5 years ago, which must be the last time I swept tabs into bookmarks.

I used to sweep them more regularly, but Firefox + Sidebery don't even break a sweat with 20K tabs, apparently, so why bother?

The only downside is that it takes about 15 seconds for the browser to launch. I restart the browser whenever Firefox or macOS is updated, so every week or two.

[kvemkon]

> about 15 seconds for the browser to launch

I also have many tabs (that's why I could quickly recall and find the post). Restoring session takes a while (much more than 15 seconds). I measure this time by looking on the CPU consumption. Only once it drops to near zero I consider session completely restored.

[quesera]

I just timed it for accuracy. When launched alone, on my M2 MBA, it's about 18 seconds to full draw of visible tab list, and 29 seconds to snappy interactivity. I didn't check CPU utilization.

Usually, when I launch this 20+Kt profile, I also launch 2-3 other profiles simultaneously (work 2Kt, personal/misc 3Kt, sometimes commerce 400t). I've noticed that they each peg a core while launching, but this is the only one that isn't ready quickly.

[precompute]

Same here. Used FF+Sidebery (and Tab Center Reborn before that) for years. ~5k tabs and it worked perfectly. With Chromium/Brave I can open maybe a hundred before the browser croaks and takes up all available memory.

I don't open heavy websites in FF, though. For youtube links, I always use Brave.