If I wanted voice search, file sharing and/or note taking I would find the appropriate piece of software for that task and install it separately.
All this does is increasing the attack surface of the browser in a ridiculous manner providing features that only very few will use. File-sharing? What could possibly go wrong?
And in the meantime Thunderbird, a stand-alone program that had a decent following got the axe in favor of more browser bloat.
I really no longer understand Mozilla's mission.