Basically, I wanna have all cache in RAM instead of my SSD. [I have disabled 'disk cache', should I disable 'offline cache' too?] 1. Setting browser.cache.memory.capacity to -1, I saw that it set 32768kB. Would it be automatically increased when I watch 5-10 videos in diffeent tabs so that I can go back and forward in video without burffering them again? 2. If it doesn't automatically increase the size of memory cache, may I set around 2gB in browser.cache.memory.capacity? Doing that woould not reserve a 2GiB for firefox when its running, right?....say, if firefox is running with caching 500mB in RAM, and only 1.5gB is left, then other programs can use that memory too, right?