IIRC it is an extension for youtube that changes titles and thumbnails to more accurately reflect the content of the videos

Ah I thought I saw v3 when I looked it up, so about double the price then but with fees (and probably low demand) my original estimate was probably correct enough

About $15 per CPU on ebay or so, so about $121,000 USD for the CPU’s alone

This update doesn’t seem to remove any add-ons specifically but turns them off on more sensitive websites if Mozilla has not reviewed them.

It does look like there is an about:config option to turn it off, however it looks like this is most likely to be for bank websites etc. and only for add-ons not reviewed by Mozilla.

Currently, at least, ublock origin and most of the bigger adblock add-ons are reviewed by Mozilla and shouldn’t be affected