My dear jinkzzz.. have you heard of Linux ?

If yes, just give it a try.

You can enjoy a more stable and fast laptop/pc without upgrading even a single piece of hardware on your existing "Vista Ultimate" system.

 

And feel free to contact me for any assistance with the installation/usage of this wonderful OS.

 

Now, the answer for the problem which you re experiencing with firefox,

 

Mozilla Firefox  is an open-source package, which is primarily designed for unix / linux related Operating systems.

Windows version of firefox still have some compatibility / run-time issues which can be only fixed with a re-install / upgrade of your existing firefox browser. Get the latest version, where most of the bugs will be sorted out. 

 

But I believe that the problems which you are experiencing with firefox is much less compared to that with IE. ( internet explorer )