A kind gentleman pointed me to the extensions.json file which when viewed with firefox had a nifty expandable tree view. However the date was encoded in epoch seconds and it was hard to find which extension was which as the id attribute didn’t have the name of the extension nor a link to AMO.
Is there an extension or software or web app that would enable one to view it easily?
You can see a mapping from installed extension names to IDs in about:support. You can also find Epoch converters online fairly easily, though I admit it’s a fairly convoluted way to find this information. Don’t know of a better way, though.