Realised today that one of my sites has been broken because a popular adblocker blocks any file called pageview.js: https://github.com/easylist/easylist/blob/6c17106ea9480b35e972aa183ded90e2252880f0/easyprivacy/easyprivacy_general.txt#L2195
I'd recently factored out a file with this name. It's a dev site that tries to have readable file names, but this incentivises minifying!