Regarding the crashes, did you have an opportunity to review this article: Firefox crashes - Troubleshoot, prevent and get help fixing crashes? The last section addresses how you can most efficiently post crash information to this thread for review. Open the about:crashes page (type or paste about:crashes into the address bar and press Enter) and click a couple recent crash IDs. This will submit the data to Mozilla's crash server for analysis. Then you can paste the IDs here and a volunteer can take a look at the data.
Regarding AOL mail, slowness can have many causes. When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.
(1) Bypass Firefox's Cache
Use Ctrl+Shift+r to reload the page fresh from the server.
Alternately, you also can clear Firefox's cache completely using: