My Ledger is having a problem linking to MetaMask in Firefox. This happened to me a couple months ago and I followed the steps in the MetaMask support article about this very problem. I got it to work right away at that time by going to "about:config" and setting u2f to "true." I followed those same instructions again today to no success. I also updated to the current firmware on my Ledger device. I've restarted Firefox, my Ledger, and my computer in every order I can think of and nothing has changed. I've changed u2f to "false" then restarted and then back to "true" and restarted and nothing changed. I'm out of things to try so I'm messaging in hopes of finding a solution. Thanks.