[alphapapa]

Again, this is not accurate.

1. Developers are lazy. This includes addon developers. Until there is a concrete time that their existing code will stop working, there's little incentive for them to bother rewriting their code.

2. For extensions which require non-existent WebExtensions APIs, there is nothing they can do but hope and pray that Mozilla will deign to make such APIs to enable them to rewrite their whole codebase to use them. If Mozilla declines, then the addon author can do nothing except watch their extension die.

It is not a matter of addon authors not believing Mozilla. The ball is in Mozilla's court to follow through and enable the extension authors.

Now Mozilla has set themselves an arbitrary deadline to disable XUL, using the excuse that e10s and other XUL-breaking stuff will arrive on that deadline--which is another arbitrary deadline that they set. Is there a term for this kind of internal self-buck-passing?