Same here... I very rarely see Firefox crashing or a tab crashing on Linux. It happens once in a very rare while that I see a tab crashing but the whole browser never crashes.
Memory leaks can be bad indeed and here are two tricks that work fine for me: either run Firefox inside a Docker container... Docker container on which I put CPU and RAM quota. It's IMO way easier than try to put resources quota directly on Firefox. The other one: Firefox has zero issues reopening all my tabs, so I simply kill it from the terminal when I see that it's going wild on memory. Now I've got 16 GB and Firefox rarely eats it all and it's usually not sudden: it's a slow bleed over the course of a few days... So when I get to something like 10 GB of memory used by just one Firefox instances (I typically run several Firefox instances, from different user accounts) , I just kill it and restart it, while choosing to reopening all the tabs (usually tens of tabs).
I'm sure there are other methods too but this works fine in my case so I haven't looked much into it.
I also notice the mem leaks, but I can usually leave my Firefox process running until there is the next update to install.
What works for me is having the `about:memory` tab open and clicking on "Minimize memory usage" at the end of the day when I suspend the machine. And, I have a lot of tabs and windows open, strewn over various virtual desktops. Though most tabs are not loaded but more expensive bookmarks, but I have no add-on which actively unloads tabs.
Memory leaks can be bad indeed and here are two tricks that work fine for me: either run Firefox inside a Docker container... Docker container on which I put CPU and RAM quota. It's IMO way easier than try to put resources quota directly on Firefox. The other one: Firefox has zero issues reopening all my tabs, so I simply kill it from the terminal when I see that it's going wild on memory. Now I've got 16 GB and Firefox rarely eats it all and it's usually not sudden: it's a slow bleed over the course of a few days... So when I get to something like 10 GB of memory used by just one Firefox instances (I typically run several Firefox instances, from different user accounts) , I just kill it and restart it, while choosing to reopening all the tabs (usually tens of tabs).
I'm sure there are other methods too but this works fine in my case so I haven't looked much into it.