Using Firefox,and using it from long time
there have some good features and also so helpful

Both IE and Firefox.

google is evil.

Thats what i would hope. Government computers generally dont run uncertified software (or, in some cases, any third party software at all) for fear of invalidating thier (expensive) support agreements.

Also, IE can be locked down selectively using group policy/Active directory very easialy which makes a lot of sense on a defence network.

And the ads for IE are so er, gross

Firefox 3!
I just can't stand IE for the issues I get with it when writing stuff for the web. It always happens that IE buggers up something by implementing it in a non-standard way, which always complicates things.
And for this reason, I shall never show it any love

I said earlier I use IE for things that demand it - recently found I don't even need it to get Windows updates - that link works through FireFox. Didn't use to. How nice!

Still, have to have IE 6,7, and 8 handy to check web pages I create. IE does really screw up some of the formatting, especially CSS. And I'm not even doing anything particularly fancy or taxing.

Any feedback on FF 3.5 yet? Haven't upgraded any boxes to that one yet.

AJAX seems to work better on it (i think due to the improved and faster JavaScript engine)

I am using Firefox, of course. I find easy to use, it is a fast and secure browser with lots of options.

Chrome for the win. So fast and light.

One more vote to Firefox...