My youngest brother is not so tech savvy asked why websites always looks different on my PC... the answer adblocker... I built him a new PC with ubuntu lts and KDE with a windows like layout and installed firefox and chrome w/adblocker, open office, a few other open source replacements, setup the printer, email, etc... I was worried his wife wouldn't like it and I would be installing win 7 in a month but they both love it everything was already setup and it was familiar enough that they don't even ask questions. I imagine the android tablets and phones have given them enough exposure to an alternative os that it wasn't big deal so long as everything worked.
On to the point... no clue but I have installed adblocker for multiple friends and family.