Previously what worked was clicking the the "+" next to request in history, either before or after sending a request, transferred the request to a collection (did I get to pick which one? I don't remember).
Yesterday it stopped working. Clicking that "+" now does nothing at all.
FF version 104.0.1 (64 bit), Mozilla Firefox for Fedora, fedora - 1.0 (sounds dodgy)
Fedora Linux 36
What else can I tell you?