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This is the only anti-ads extension I can Trust so far.
Thank you R. Hill!

uBlock ORIGIN is recommended! (https://en.wikipedia.org/wiki/UBlock_Origin)

and it is different from:
uBlock which sucks
Adblock which sucks
Adblock Plus which sucks (e.g. https://www.quora.com/What-is-your-review-of-Adblock-Plus and https://en.wikipedia.org/wiki/Adblock_Plus#Controversies)

Got installed on my Android 7 Firefox. Thank you, I will try it, although on the desktop Firefox it works well.

Simply the best adblocker out there. Very customisable too!