I have two recovery keys, how can i check which is the one set for my preferred installation of Firefox. One was for my en-CA install, the other for an en-US install made a week later due to an update glitch. I had to use my en-CA recovery key to recover my settings to the en-US install, which also made a new recovery key. I want to get rid of the spurious en-US install.

Now i don't know if that new recovery key replaced my en-CA install's key.