Try clearing site cookies for the affected sites.

Does it still happen in Troubleshoot Mode?

Thanks for the response. Yes, it still happens in the troubleshoot mode. I have also tried clearing cookies and data. But it didn't help.

Does it still happen in a new profile? An easy way to test a new profile is to install Developer Edition and see if it happens there or refresh your existing profile. Make sure you stay signed out of your sync account when testing.

I freshly installed the developer edition. I haven't logged in or anything. Still I can't use the arrow keys to navigate. The bug still persists.

Am I the only one facing this issue or is it a bug in google's web components compatibility with firefox?