its proly cuz of 1 or more of these reasons
yur vertion of firefox is an old one so update it (go 2 firefox.com)
yur internet conection sukz solutions: 1 make sure no one is on but you, 2: get a difrent and beter provider (if u get internet from cable i have no idea how 2 help u cuz i dont have cable :( )
you dont have a lot of ram. ram is very important all i know is that it alows your compy 2 run faster and smoother
you dont have a lot of extra space on your drive. its kinda like ram the more space u have the less your compy has to look thru 2 find the rite file(s)
u got viruses. it really depends on the virus for this one, my compy has at least 1000 viruses but it still runs ok but thats proly cuz the viruses are porrly constructed. try an anti-virus program to clense your compy. i wouldnet recomend a free one that you download from the internet cuz more often that not the anti-virus program is a virus so buy one from a computer store
Well i noticed that if i click some links the page starts to load then the ads start to be trasfered and firefox wil crash. So i cannot play the CP no matter what because of adbirght.com, or something similer.
Edit: also i spelt crashing wrong. idk how i did that.