I've been using Firefox for a few years
(since it was known as Firebird), and love it.
It's a more secure browser than Internet Explorer, because it doesn't use
ActiveX controls, but
Java applets instead.
Also, if a security flaw is discovered
(which doesn't happen often), it's usually fixed within a few days, as opposed to the months you have to wait for an Internet Explorer security patch
In most instances, you will find Firefox to be a faster browser than IE, especially if you employ pipelining.
Firefox Web Browser - PipeliningThe reason it's faster is because Firefox doesn't come pre-loaded with a bunch of features you don't need.
You can run Firefox as lean, or as bloated as you want with the use of extensions, which allow you to customize it the way
you want it, not the way someone else thinks it should be.
Enhancing Firefox with Browser ExtensionsExtensionsNOTE:When adding extensions I'd advise adding one at a time, try it for a couple of days, and if no problems arise, add another.
Sometimes extensions have been known to cause problems, due to incompatibility's, or corrupt downloads.
If you install them one at a time, and test it, it's easier to troubleshoot if one starts causing problems.
You don't have to uninstall IE to use Firefox, or any other browser.
In fact, you can't uninstall IE, because it would damage Windows, since it's intertwined into the operating system.
You can use as many browsers as you want, at the same time.
There should be no conflicts. intertwined
Give it a try, you have nothing to lose.
If you don't like it, just uninstall it, that easy.