My rant about release notes being in the way was apparently my own mistake? Well, issue fixed. Good!
Dev-team is really on top of everything :)

And now the review of the add-on itself:
Loading all those often-used files from a local database, instead of dl-ing them from CDN-sources on the net every time, prevents you from broadcasting your browsing habits to those CDN-hosts. And it's faster, too.

LocalCDN appears to do this task very well, and is rather frequently updated. It inspires me with confidence, knowing that I have more privacy *and* a faster browsing experience at the same time.