Но установилась uBlock Origin Lite -Manifest V3 какая-то.

Какая-то ? Я же давал ссылку на ответ разработчика, где он все поясняет. Про manifestы, про разницу между uBO и uBOL (uBlock Origin Lite) и тд.

uBO Lite (uBOL) is a pared-down version of uBO with a best effort at converting filter lists used by uBO into a Manifest v3-compliant approach, with a focus on reliability and efficiency as has been the case with uBO since first published in June 2014.However the focus on reliability and efficiency in a Manifest v3 environment meant having to sacrifice many features beyond those not possible within a Manifest v3 framework.See the official uBOL FAQ webpage for more details about how uBOL compares to uBO.Manifest v2 uBO will not be automatically replaced by Manifest v3 uBOL. uBOL is too different from uBO for it to silently replace uBO -- you will have to explicitly make a choice as to which extension should replace uBO according to your own prerogatives.Ultimately whether uBOL is an acceptable alternative to uBO is up to you, it's not a choice that will be made for you.