see this thread: https://news.ycombinator.com/item?id=20050173

I was wondering the same. I think it's a new standard for how Chrome extensions work?

I hope it doesn't affect FF users, and uBlock Origin will continue to function same as it always has.

Why hope? If a market majority product does something, so does the rest of the market. Especially now that Firefox has like 3% market share.

Fresh info regarding mv3 & FF:

https://blog.mozilla.org/addons/2022/05/18/manifest-v3-in-fi...