@msolga,
Hello MsOlga,
I'm late in getting in on this thread but FF probably just needs a little "cleaning" depending on the version this can be fairly easy. Try
http://support.mozilla.com/en-US/kb/How%20to%20clear%20the%20cache
if you haven't already. (I'm sorry I didn't read all 5 pages.
Regarding browsers:
FF is great, but it can get a little CPU intensive. I've switched from FF to Chrome. Chrome takes up more space on the hard drive but I rarely run into issues. It's fast with very little learning curve. The only real downside is compatibility. There are sites and apps that don't support it yet.
IE and FF are the two biggest programs and will give you the broadest range of compatibility. With the latest build of IE (8) and the Beta version 9, I am actually liking IE as my "go to" browser.
Safari is an OK browser but it doesn't really bring anything special. Also, to me, it's a bit clunky for lack of a better description. Personally, I can't really see a reason for me to switch.
Opera is kind of nice and minimalistic, but also suffers from compatibility and layout takes a bit getting used to. It's more for the geeks who like a change, imo. There is nothing wrong with that, mind you.
In short, my advice would be to try to fix FF (even if you delete reinstall - after backing up your favorites!!!!) since that's what you're used to and it's a solid browser. Failing that, IE. Your system is more than enough for what you're doing and I would tend to lean away from putting too much money in upgrades.
Back in the day, we used to equate computers to libraries when we'd train new franchisees. In short it went like this:
Your hard drive is that actual shelves of books.
Your CPU is the librarian.
Your RAM is the desk you use to view the books.
Your Video card is the speed you can read.
How it works is, you request data (books) for whatever your doing (Internet, Word documents, games etc...)
The librarian (CPU) runs to the book shelf and gets you the book or books you want and places them on your desk (RAM)
The video then displays whichever book you want to view now.
The faster your librarian, the faster you get the information to desk.
The Bigger your desk, the more books you can have open at a time without making a mess or knocking something on the floor.
The better your Video Card, the faster you can read the books without getting a head ache.
The bigger the hard drive the more books you can have and/or add to your library.
Yes, this is an over simplification but it does give you the general concepts on the relationships on the hardware side. Sometimes that analogy is helpful and sometimes it isn't. Hopefully it helps you. If you've actually read this post in it's entirety you deserve at least a little relief from computer problems and maybe even the winning lotto ticket! (in other words, i'm sorry it's so long
)
Good luck in fixing it. I hope you'll let us know which way you go and how it works!