WTF, Firefox?

[classicdrogn]

Was there an update pushed overnight (on Ubuntu/XFCE, without requiring me to use the usual interface gadget and agree to it) or something? 'Fox suddenly wants another gigabite of RAM, which means it takes about half an hour to load a page because that does not exist and shoving everything into the page swap apparently clogs the works like nothing else. I didn't open any new pages and my ad-blocking is set to "maximum hostility even if it means content doesn't load correctly" and it is, as noted, aLinux ssytem, so viral shenanigans seem unlikely (also, it's ONLY a problem in 'fox, I'm using Chrome for this just fine but I hate the way Chrome takes away most of the interface I'm used to)