Firefox has been a product of its own success. It's turned into a bit of a memory pig. I've been using Chrome for about 95 percent of my work. I use FF for certain things.
I am in the enviable position of not caring at all about memory usage. Laptop has 16G of memory, so even Firefox ain't gonna mess with me on that. It's a really nice HP laptop workstation!! Plus an i7-3820QM quad core @ 2.70 GHz. Could overclock, but don't really see the need... When docked, I see two 24" monitors. Wish they were 26" !! And 4 of them, like with the Z400 desktop workstation on the desk! MATLAB seems to run a little slow to me, but I think I am mostly just spoiled....
Have been thinking about trying Chrome, though, just to see what it is like.