I've used FireFox extensively and never had to update FireFox like it's asking you to nor is it slow - it's one of the best fastest browsers I've ever used. Sounds to me like you have serious problems with your computer that have nothing to do with FireFox.
thats more like it, Firefox is one of the BEST browsers there is, sure Chrome is faster but its not as secure, and Firefox offers a lot of useful addons. Updates takes up hardly much if you're on broadband or DSL.
I dont know what you're talking about, or more so that you probably dont know what you're talking about!
you need to set default browser, update once, say yes to install and also check your anti virus it is blocking it? if so, tell your antivirus to allow Firefox...then come back and tell us if you hate it or not.
IF anything to hate about firefox i would imagine it to be the style of layout. buttons, they you're not used to. also one other thing, you can reveal buttons, shape it how you want, if this seem to be a problem, go to option , the 'set default' or reset im not sure im not looking right now got things to do...but above all just tweak two things, your antivirus, and the take it back to default then go from there...
and..if you still continue not like firefox, by all means, go to START/CONTROL PANEL/Programs and features/UNINSTALL...SIMPLE