How do I view Mozilla Firefox installed plugins add-ons list under Windows / Linux and Mac OS X operating systems?
You can easily view all installed plugins simply clicking on the Tools menu > Addons > Extension tab:
Type the following command into the address bar (URL bar) and press [Enter] key:
You will get the list of all installed plugins as follows
To see memory and disk cache including details for all website, type the following command into the address bar and press [Enter] key: