The regulations outright stated that it has to be allowed. So they knew it was going to be allowed on iOS. Like I said, the only question was how: Mozilla didn’t know what the mechanisms made by Apple to make this work would look like, but that can be worked out fairly easily later, once they have a working build.
True, but I don’t think a fund limited organisation like Mozilla is going to spend a lot of money and time on a maybe.
Regulations are not "maybe"s.
The regulations outright stated that it has to be allowed. So they knew it was going to be allowed on iOS. Like I said, the only question was how: Mozilla didn’t know what the mechanisms made by Apple to make this work would look like, but that can be worked out fairly easily later, once they have a working build.