I do. I use a separate browser. There are people who want to do everything from their editors. There are people who want to do only editing in the editor.
And there are middle ground people like me who want editor integration when it makes me more efficient (like invoking frequent VC commands right from the editor), but I do mail and browsing and stuff with external tools.
Well, you're clearly replying to an emacs user. He/she will not find that statement the least hyperbolic.