I'm writing a Firefox Add-On using the WebExtension API. Some of the APIs (such as browser.storage.sync) require an Add-On ID to be explicitly declared in the add-on's manifest.json file.
The documentation for IDs states:
The ID of the extension, which must be one of the following:
- GUID (Firefox 1.0)
- A string formatted like so: extensionname@example.org
The latter format is significantly easier to generate and manipulate. Firefox 1.5 has checking to ensure that your id falls into one format or the other and will refuse to install add-ons that have malformed ids. You should not use a real email address for your id, however, as it might attract spam.
The documentation is not very clear with regards to what kind of string I can provide. Is it...
- Any valid email address?
- Any string that "looks like" something@something.something?
- How about a@b.c.d.e.f.g?
- Should it be relevant to the extension itself?
- Should it have a domain name I own or can it be any?
etc.
Because I must declare the ID explicitly to use browser.storage.sync, I am unable to depend on the automatic ID that can be provided by Firefox for WebExtensions.
What are the conventions for explicitly declared add-on IDs in Firefox?