In my Linux Mint Rafaela Cinnamon, Firefox has suddenly become terribly annoying and buggy. There are several different bugs. One is that when I am in one Gmail account, and I try opening the other from that page, it doesn't get any farther than loading about:blank. Another is when I try to attach any attachment with a size of just a couple megabytes (in GMail) it fails. Yet another one (though this is inconsistent) is when I try to search google from the URL bar, it loads the google search page, but doesn't give results, and I have to refresh the page again. None of these problems existed before, and I have no clue what I have changed. I have tried refreshing AND reinstalling firefox, and it has done no good. What can I do?