Yes but the HN guidelines also lets the submitter use some judgement if the title is misleading: >Otherwise please use the original title, unless it is mislead

Yes but the HN guidelines also lets the submitter use some judgement if the title is misleading: >Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize. But I'm not going to nitpick this thread's title. If "Ad-free internet" is the best representation for HN readers because Mozilla itself used it, that's fine too.