mediafire incompatibility
Trying to access my files on mediafire.com using FireFox 16.0.2 on Windows XP, I got a 99% progressbar that hung before reaching the end. Disabling HTTPS-Everywhere 3.0.4 allowed me to view the files list. Enabling it again stalls the progressbar. I don't quite know what's going on there, but I eliminated all other variables. I haven't had this problem before, so it may have creeped into a recent HTTPS-Everywhere build.