Lately the last few updates of firefox causes high memory usage, before I used to have nearly 80 tabs open and memory would be fine, now just having 57 tabs open causes memory to hit 15gb out of my 16gb cap. Runs the whole pc really slow. It has something to do with updates because I never changed anything else. This sounds like a typical phasing out of windows 7 to me. How do I reboot about:config to default settings? In case I did something with my privacy settings, that is causing this high memory usage?