do i need to uninstall windows internet explorer?

I would say no because you don't have to,

and i would keep Internet explorer because it is easier to download files and watch some videos than Firefox.

Keep both browsers.

No, Windows and IE are fully integrated, and IE should not be deleted. Windows uses it for Windows Updates, among others.

Just make Firefox your default Web Browser (in Tools > Options...) and enjoy!!!

no you do not have to uninstall windows explorer because it will still work even if you are useing firefox ☺☻

No you don't need to and probably best not to try since IE is built into Windows.

No. But it's recommended that you use only one web browser because the use of various browsers can create little conflicts.

Not if you don't want to.

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IE IS ****!!