I still have to restart Firefox at least once every other day because it leaks and becomes a runaway process.
No plugins/addons. As stock as it gets. One single website only... and it still pukes all over itself.
Because I have firefox instances running for months with tremendous amounts of tabs open on 8GB of RAM laptop and has absolutely zero problem with it.
Apt runs weekly.
Firefox still blows.
It's a memory leaking hog on every system I use it on. Windows, Ubuntu, even Android.
Even back to the days of Phoenix, it always had issues with not eventually turning into a leaking process.
The memory usage isn't amazing but it's not terrible. If I go to about:memory and do a report, it seems that nearly all of it is going to Google websites despite being the vast minority of my open tabs. Gmail, Gchat, and Youtube.
So I'm not going to sit here and blame Mozilla because Google websites in particular are hogging a lot of memory.
And this was after nuking the configs and doing an "sudo apt purge firefox && sudo apt install firefox"