In particular it looks like Firefox Fenix/Preview (or possibly Reference Browser), not Fennec (regular Android). Only Fenix and Reference have bottom URL/tab bars. Fenix has a purple "Try Again" button, I don't know about Reference Browser, and Fennec has a gray button.
One possible issue is that Fennec/Fenix doesn't open http URLs in external apps by default (unsure about custom protocols), whereas Chrome does.
One possible issue is that Fennec/Fenix doesn't open http URLs in external apps by default (unsure about custom protocols), whereas Chrome does.