My issue with FF's auto update is that the behavior is how painfully the auto-update works with multiple profiles.

I'll have one window (well three) open for some (measurable in days) time.

1. FF updates silently, I haven't restarted my browser so I haven't noticed.
2. I go to open a session in the second (or third profiles)
3. FF decides now is a great time to apply the update, after all it just opened right?
4. All the existing open browsing sessions in the other profiles get bricked. The tabs just stop responding, no browsing works, just dead in the water.

I have to shut it (all?) down to get it working again.

I don't know how Chrome handles this so I cannot compare. TBH still worth using FF over that adware!

I see it like thank you that i don't have to go to Mozilla website and download the installer. So much time saved, and it only takes like 5 second without manually doing anything. On Linux i saw please restart Firefox tab and clicked it. No problem. I got the update fast.

I kinda have an up-to-date fetish, otherwise I wouldn't use Arch testing everywhere, so every time I boot up my PC I instinctively update the system, including firefox, despite that I am already using it.