Better identification of extensions

[grahamperrin]

From https://addons.mozilla.org/addon/nightly-tester-tools/reviews/1035543/:

… identifying extensions primarily by name is troublesome. Because addons.mozilla.org (AMO) too often makes it unnecessarily difficult to find by name; because developers too often use multiple names for a single product; ….

The extension could be improved by more positively identifying extensions. Include:

• either the AMO address of the extension, non-localised, for example https://addons.mozilla.org/addon/nightly-tester-tools/
• or (if not listed on AMO) ideally the support URL, less ideally the home URL.

If no URLs is associated with the extension, be explicit about the absence of a support URL.

[whimboo]

Thank you for filing the issue. So which details of extensions the WebExtension API supports is listed here: https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/management/ExtensionInfo.

Right now we use name, version, and disabled status: https://github.com/mozilla/nightlytt/blob/master/extension/shared.js#L93-L98

I'm not sure what's best to be added here given that homepage is not always used, and id is not helpful because it cannot be used on AMO to search for a specific extension. Maybe we use homepage if present, and fallback to the id if not set?

@kyoshino what do you think?