I have been having trouble entering information or accessing certain websites. This has been getting worse regularly. Either I can't sign in, using manual or saved information in my password keeper, or I can't enter information on sites on which I'm trying to make a donation, such as my address. Or it will do that and then not let me enter credit card information, again either automatically or manually.

Note that I then have to open a different browser, and then I have absolutely no trouble. If these problems aren't fixed, I will have to stop using Firefox as my default browser, which it has been since its beginning. Please advise.