content: Actually memory use of FF is quite easy to fix yourself. FF has this retarded design that it does not clear it's web process memory until last tab rendered by this process is closed. This makes having one tab open and 2GB of ram taken a common occurrence. This is most commonly happening for people that have some tabs constantly open, and never close them (obviously). To minimize impact of this issue you can make firefox use many rendering processes for web content. That means that if you use 4 processes then all 4 of them will leak memory in even manner and leaving one tab open will dispose of 3 of them. Try it out, the difference was massive for me in normal use. To change the amount of processes set "dom.ipc.processCount" to whatever number you see fit.