Firefox extension not recognizing new master password
I recently changed my master password in 1P3. Now, when trying to use this new password with the Firefox browser extension, I get a prompt telling me to input the old password. When I do, the extension says the password is incorrect. This is frustrating because that old password has successfully unlocked 1P since I purchased the app. I have tried deleting and reinstalling the extension to no avail. When I experienced this same issue on my work laptop a while back, I dimly recall a fix involving the removal of some obscure (to me) file, but alas I cannot recall which file. Can someone refresh my memory? Thanks!
BTW, I'm using Firefox 25 if that makes any difference.