Started playing up Rated 5 out of 5 stars

Have had no problems until a few weeks ago when I was finding I was having to click OK several times before being able to exit Fiefox, in fact sometimes just having to Cancel because it was unresponsive. Seem to have cured the problem by disabling AskForSanitize, enabling the 'Use Custom Settings' option in Firefox History, exiting Firefox then reversing the procedure to get back to normal.

This review is for a previous version of the add-on (2.1.1-signed.1-signed).