NOTE: The AMP Toolbar for Firefox has been deprecated and is no longer supported by Level Access.
1. Activate the Firebug Icon in the upper right-hand corner of your screen. Alternatively open the Tools menu > Web Developer > Firebug
2. Select the 'AMP' drop-down menu in Firebug and then choose the 'About' option in the drop-down menu. The version will be displayed in the About contents.