RAM usage and Opera 12
I still have an XP box and have experimented with browsers for a while, as you do. Opera 12 works well on many sites, it uses very little RAM compared to when I have tried Firefox or Chrome, with multiple tabs open etc too. Chrome in particular has/had a memory leak that this Google issue thread is all about https://productforums.google.com/forum/#!topic/chrome/86yzpxX7aws (though however do you sort that into most recent???) .
Opera 12 was an excellent browser, however some sites will no longer load nicely on it. Few good browsers are left for XP now, I tried to load SRWARE Iron but the installer for that kept failing, which is not a good sign! Anyone found any good XP browsers for this experiment?