Whenever I leave tabs open in FF, it'll consume 3GB+ of memory and slow my computer to a crawl. I do the same in Chrome and it'll consume maybe 2GB RAM and it's fine. I want to use FF and support Mozilla. In fact, I lived with FF and this type of behavior for years hoping it'll get better in the next update, but it never did. FF is just not usable for me anymore. I reluctantly switched to Chrome and haven't had issues.