Firefox keeps crashing.

I finally found the solution! With help from my friends at Dell Computers, that is. The crash was due to the C: drive becoming overloaded with data. On advice, I purchased an USB portable hard drive and moved all the data not needed to be on the C:\ drive. It would be nice to have more than "common sense" to decide which files and folders are needed to run the computer nicely. If there is a book or manual that can list this for me, I'd buy it and check regularly. The computer now runs nearly like a new one and I'll be looking for a while before upgrading. Note that USB hard drives are relatively inexpensive, but need to be treated similar to the way most USB drives are (Don't just plug or unplug while the data is flowing). Storing unused files will pay off so that you don't get caught having to clean house at a very busy time. Enjoy...