Token registered on Firefox doesn't work on Chrome paired afterwards

[Aaron-P]

I wanted to test if logins would work cross-browser, and also on browsers paired after the U2F token was registered. I attempted to register my phone as a U2F device on my github account with Firefox, and I was able to do so and then log-in with it, but when I then paired a chromium based browser and tried to log in I was never prompted on my phone.