Not to mention the lack of addons (ad-blockers) and the fact that this announcement is completely useless and void of information. ("Brand new experience", whoa.)
What is happening, Mozilla?
> A new browsing experience arrives in Firefox for Android Nightly
So related to this decision I would say: nothing special, as far as I can see. They're just moving Firefox Preview to Firefox Unstable.
> while I do enjoy the new approach (...) this announcement is completely useless and void of information. ("Brand new experience", whoa.)
You're mentioning this yourself: Firefox Preview is a very new experience compared to the current mainstream Firefox for Android browser. You and I may be aware of Firefox Preview's existence, but for those out there who are not this is not a post that is useless and void of information.
But the implication is that Preview is becoming the trunk from which future releases will be cut. If Preview lacks critical features like ad blocking and is as unstable as the previous commenter implies, it's probably not ready for that yet. (I can't comment on the bugginess, since my Preview was stuck in private mode until like five minutes ago — losing tabs was just part of the deal.)
> As for next milestones, the brand new Firefox for Android will go into Beta in Spring 2020 and land in the main release later in the first half of this year.
What state it will all be in by then remains to be seen, of course.
(Aside: ugh, “Spring” as though everyone lived in temperate and subarctic northern hemisphere. Most of the world doesn’t. This is a very American/European way of expressing things.)