The build a Thunderbird extension tutorial linked to from https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Thunderbird_extensions is listed as “outdated.” It mentions using XUL for the user interface.
If I understand what I’ve read, Firefox has move away from XUL entirely.
Is Thunderbird going to do the same?
I’ve never built an add-on for either Firefox or Thunderbird. So I’d like to make sure I start out on the right track… Any tips would be appreciated. Especially on how to determine if a random tutorial I find via search is up to date enough to rely on.