Choco is pretty good but it does have less packages than say, brew.
As someone who has packaged for Mac's with brew and RPMs and debs on Linux, packaging for windows is a total pain. Choco uses nuget 2 for self hosted repos which means you need to run a server for your packages, which there are things like the PPAs for Linux and Brew uses GitHub releases so you don't need to host anything yourself to provide binaries.
This is also on top of windows needing extra work to develop for, because windows filesystem works differently enough to need code specially for windows. All of this means that windows users suffer on the open source software front.
I must admit that I do like the built in page translation, which I guess was made by a similar team using ML and all. Maybe I will like this too? Feels a bit... niche. Maybe it's a stepping stone to any misinformation at some point?
Edit This actually might not be coming as a browser feature at all. Mozilla is trying to increase the size of their Mozilla.ai team, so perhaps it's really looking for people with AI knowledge with web tech and a track record of using it for a ethical purpose. This team would be well placed to build pretty much any AI based tool for the firefox ecosystem.