I tried the "lite" Ublock on my work laptop, on the relatively uninformed opinion that MV3 really is safer than MV2 in terms of a rogue extension being able to

I tried the "lite" Ublock on my work laptop, on the relatively uninformed opinion that MV3 really is safer than MV2 in terms of a rogue extension being able to reach in and steal your secrets (am I wrong?) An immediate test with Youtube gave pre-roll ads. Oh well. But a later Youtube visit, and all since, have been like Ublock Origin - ads gone, preroll, superimposed and in-video ad breaks. I have no idea how all this works and frankly am glad I don't have to. But yes, of course, Youtube may change in the future to precisely sidestep the MV3 limitations of ad blockers.