Firefox is now the last major browser that still supports uBlock Origin

Firefox says it will keep supporting uBlock Origin even as Microsoft Edge and other Chromium browsers phase it out under Manifest V3.

www.pcworld.com/article/3212428/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin.html

The best extension :)

+ a mediocre browser

What is mediocre about it? What would be an example of a good browser, and what are the differences?