Originally posted by mosquitorespect You will need IE to access certain websites which have not been programmed (right word?) to accept Firefox. Also you will find you need it for Windows Update and to download extra functionality for Microsoft programs such as the Office suite, as propietary ActiveX controls are used.
There is an extension for Firefox that allows you to open a link in an IE tab (still inside Firefox itself). You can also set it to always open certain pages in embedded IE.
Surprisingly it's called IE Tab.
I have never had an issue with Firefox and highly recommend it to everyone.