peaveyman wrote:With 19 tabs open Firefox is using 679k of memory + 50k of shared memory.
I just managed to get 19 tabs open (now I think that is quite a lot!). My memory usage is now 427k + 24k shared, so yes your usage does sound high, although it probably also depends on what you have open in those tabs. I have no lag switching tabs. Did you try what Stupot suggested?