Hi, Strongbox dev here. I also didn't realise that there was a hidden vote button... This would be a great feature, making everyone more secure, it would be very cool to see this in Firefox.
I think it's important for anyone on this thread to now make sure they have voted rather than added their +1 comments, as perhaps these aren't being counted properly. It would be great if anyone following could do as kesselborn said:
Go to the very top, expand "Details", there is a "vote"-Button.
Also, I'm happy to try to help with any technical questions or issues, I've integrated with the require Apple API on the supply side (Strongbox tells Apple's Password AutoFill system it can supply passwords for x domain and y login). The following are good places for a developer on the other side of this API to start...
On the client side Apple provide this AutoFill behaviour out of the box on NSSecureTextField & NSTextField (contentType property == username/password/...) and in WKWebView for HTML input elements with the correct attributes. You can read more here:
I hope that's helpful, this would be a killer feature for those using Indie/Third Party Password Managers...