- act like Mozilla just killed their extensions lightly. They gave lots of warning in advance and took many extra steps to ease the transition. They also had lots of really good reasons for doing it.
- blame Mozilla for marketing things based on what their market looks like. Most users were not affected at all by the extension ecosystem change, but were positively affected by the newfound performance, security and stability. They also would not have done it in the first place, if they did not think it was a necessary and good step. I really don't know what you'd expect them to market it as.
- in general, speak like you're the only user whose interests are worth considering.