If available. If not, you'll quickly learn to not open 50 tabs (it's not like you're actually browsing in all of them). Had to work on such a PC out of necessity, and :5 tabs should be enough for everyone" ;)

But seriously: 2 GB on Windows (7) is still usable, even though not entirely comfortable. (Of course, on LXLE, 2 GB is a lot, but that's an entirely different can of worms)