It seems Firefox just updated. Norton detected "updater.exe" as a download and cleared it, stating it was from Firefox. Ever since, Norton shows repeatedly "initial firewall rules update failed" and "Norton Community Watch Feedback". There are also two suspicious things marked in the history as:
Statistical submission: suspicious.cloud9 exonerated
Statistical submission: xul.dll
Am I infected (Norton scan picks up nothing) or is this a Firefox conflict? I'd like to add that the browsers are running extremely slowly as soon as updater.exe from Firefox showed up.