This may be a Firefox issue. I would start by clearing the cache and cookies, and starting a new session.
@AllenB I figured out the problem posed in #100, those three link examples contained the letters "amp" and were unexpectedly removed from the URL address and redirected by a browser extension that was supposed to address a special internet (snooping) feature called AMP (Accelerated Mobile Pages) invented by Google, the extension in question misbehaved and is now removed, so all is ok here.
https://en.wikipedia.org/wiki/Accelerated_Mobile_Pages
https://en.wikipedia.org/wiki/Accelerated_Mobile_Pages#Reception
https://blog.google/products/search/introducing-accelerated-mobile-pages/
https://en.wikipedia.org/wiki/Accelerated_Mobile_Pages
https://en.wikipedia.org/wiki/Accelerated_Mobile_Pages#Reception
https://blog.google/products/search/introducing-accelerated-mobile-pages/
