Is anbox still supported?

Is it supported for oneplus 3t?

https://docs.ubports.com/en/latest/userguide/dailyuse/anbox.html

I've just installed on a oneplus3 and very impressed with the experience!

Incredible work of the team!

I am intrigued about getting Libertine to get setup though and I've been having issues.

I've tried to install Evince and Firefox and it seems to attempt to then rolls back and deletes the entry in the container.

Would someone mind showing how you should install firefox in Libertine?

Also what other apps are good to use in Libertine?

I'm following instructions here on this video https://www.youtube.com/watch?v=b4WkjUkHUzw on installing ubuntu touch on a oneplus 3

however at the point of installing the andoird using below command

adb sideload OnePlus3Oxygen_16_OTA_086_all_1911042118_997006918a894202.zip

It then sideloads it to my phone but always fails at 47%
Then says installation failed on my phone

I used ubports for ages on a one plus 1 and the bq.

I bought a pinephone when it came out but it went unused. I've recently picked it back up and most of ubports on the pinephone seems broken.

Some queries I have
-Installing transmission just has it stuck on "Extract transmission"
-Is ubports getting firefox anytime soon?
-Even after charging for ages and leaving my phone connected to wifi it doesn't seem like any OS updates are available?
Has there not been an OS update for pinephone in the 2(maybe even 3 or 4) years since I bought the phone?