autodetect is utterly broken on 64bit systems Rated 1 out of 5 stars
This add-on is a great idea that is executed poorly and seemingly hasn't been tested at all on 64 bit windows.
It fails to autodetect anything (except chrome and ie), including thunderbird in which it is installed.
The reason is this that it relies almost exclusively on registry scanning of HKEY_CURRENT_USER\SOFTWARE.
Change the add-on to scan all the relevant places listed below and it would probably be a 5 star plugin and not a complete dud