The new MV3 architecture reflects Google’s avowed desire to make browser extensions more performant, private, and secure. But the internet giant’s attempt to do so has been bitterly contested by makers of privacy-protecting and content-blocking extensions, who have argued that the Chocolate Factory’s new software architecture will lead to less effective privacy and content-filtering extensions.
For users of uBlock Origin, which runs on Manifest V2, “options” means using the less capable uBlock Origin Lite, which supports Manifest V3.
I’ve used Librewolf until pretty recently and I say it’s not for everyone. It’s hardened Firefox made into its own thing for people who want the benefits of hardened Firefox but don’t want to go through the effort of hardening their Firefox install.
There are some sites that wouldn’t work in the strictest settings. As far as I remember, the most problematic sites with Librewolf are those that demand way too much in terms of privacy and security, so I took it as a given that if a site doesn’t work with Librewolf (with me using the default settings), it’s not worth it to enter to begin with.