I have Ad Blocker, but it has become unreliable. I think they sold their souls and are being paid to allow many ads.
I tried Ublock, but had some problems with it, IIRC.
I will check out NoScript.
With all the screwy stuff Mozilla is doing — rapid releases and revamping their extensions programming — it is difficult to keep up.
There are several extensions with "uBlock" in the name. "uBlock Origin" is the one you want.
Pale Moon and Waterfox are similar enough to Firefox that there is no learning curve—and with them you avoid the problems associated with Mozilla's management.