Extension support is coming, but at the moment only uBlock Origin is available.
https://blog.mozilla.org/futurereleases/2019/06/27/reinventi...
Probably not. By the time the switch for release (non-nightly/beta) Firefox comes, I expect all the currently supported extensions will still be supported.
In the long-run, since the new architecture will be generally easier to develop, I hope that some of the WebExtension APIs supported on Desktop, but currently not on Android (on Fennec), will also become available on Android (on Fenix).
I think you're being too optimistic - the fact that the regular Nightly and Beta release channels have already been transitioned to the rewrite means that at the same time you've lost all large-scale capacity of doing any pre-release testing on the old version. While that one has been getting ESR-style bug fixes only for quite a while anyway, even those still need some amount of testing. So barring some major hold-ups, they're now committed to transitioning the Release channels in the near future as well, even if that means mediocre add-on support and quite a few other missing things.
And it's been clear for quite a while that they've decided on a https://www.joelonsoftware.com/2000/04/06/things-you-should-... -style rewrite for better or for worse...
- uBlock Origin
- NoScript Security Suite
- Dark Reader
- HTTPS Everywhere
- Privacy Badger
- Search by Image
I like the new UI: quick and intuitive. When you open a new tab, you see your most-visited sites, open tabs, and collections.
Liking collections, currently have 'Web dev' for my in-progress projects & servers and '{My city}' for local (health) news and other resources.
When I tried it a couple months ago, I remember being impressed but put off by missing features - downloads didn't work, etc. But it's looking better, good enough to use daily with Brave as a backup.