TU #58 states "…please mention this fact in the report". What fact it refers to? To the fact that one has reported the bug to the extension developers? Then IMO TU #58 should start with "If you also decide…". But I am not a native English speaker.
BTW. Also we do not report bugs on Wikipedia.
I admit I don't understand that sentence either. Maybe just fine to remove it? It was added in https://www.mediawiki.org/w/index.php?diff=3615728 by @קיפודנחש
I believe that "this fact" refers to "If you find that the problem is indeed related to a browser extension". If you know that the browser extension is involved, but you want to report the problem on wiki, then please tell the other editors/volunteers that this browser extension is involved.
Ah thanks, that makes sense! I've made an edit in https://www.mediawiki.org/w/index.php?title=Help%3ALocating_broken_scripts&type=revision&diff=5235056&oldid=5234865
