[alphapapa]

This call for, "Just tell us what APIs you need!" is missing the point.

1. There's no guarantee that Mozilla will actually implement such APIs, and no guarantee that they will actually support them in the future. If past behavior indicates future behavior, they will support them for 12-18 months and then say, "It's not worth the effort anymore. But here's a new bundled Facebook plugin that we're totally not being paid to put in. Have fun!"

2. More importantly, many of these extensions would never have come to exist if their authors had had to beg Mozilla to implement an API first. If XUL had never existed, would ad-blocking extensions have ever been created? I can imagine the Bugzilla pages now: "This is not a priority for our limited manpower. Restricting this issue due to advocacy. You can discuss it further on the mailing list."

Firefox - XUL != Firefox