Description of Error
Users of Firefox ESR (Extended Support Release) may receive an error message saying their browser version is out of date which prevents them from using Duo to sign in.
Resolution / Next Steps
This is a known issue. It appears that Firefox’s user agent does not distinguish between the regular release and the ESR release, so Duo cannot tell whether Firefox ESR is out of date. As a result, it shows the error message to be safe.
If this prevents you from using Firefox ESR with Duo, you will need to switch to another web browser such as Google Chrome, Microsoft Edge, or Safari. Alternatively, you can try resetting your Firefox "default user agent" settings.
For Additional Help
If you still experience problems please submit a support ticket by emailing nusupport@nebraska.edu.