Adding to this converstation only anecdotally:
without solus repo or flatpak app help when I save something off the web, then try to open it, I have about a 25% success rate. Meaning 75% of webp files won't open.
I've tried the extension change trick (jpeg, png) but that is successful less than 25%. not a great solution
Anybody ever just simply play with the print settings? I always forget when I print/save a page. Pomon up there is on to something.---(In other words I wonder if I can find a consistent way to open webp's withouth the benefit of an app?)
noise617 ---there are several solutions offered on this thread.