Firefox Focus is built on a different rendering engine, not quite fully HTMl-compliant. If your phone can handle it, full FF Mobile works well, and supports both uBlock Origin and ViolentMonkey (great for using the mute script).
Serious question, for once: if I forward a mail, from a pseudonymous acc (like this one, for instance), and spoof the alleged sender’s address - isn’t this going to be full circle? Everyone looses?
Absolutely. The telemarketer/scammer keeps thinking he’s just at the point of hooking this big, lucrative fish-- but, then, it wriggles off again. But not too far off. So he tries again. And again. And again.
Just FTR, current media reports speak about scam calls asking questions like “Can you hear me? Hello? Can you hear me?” to get a clear “Yes!”. This is used to subscribe you to overpriced subscriptions of magazines and suchlike.