I keep getting an "dnsServer Error" on FireFox Nightly. Can you fix that for me?

Hi John

Thank you for helping to test a Nightly build of Firefox. Please appreciate that this build is still "under construction" and as such may have some unresolved issues.

You may wish to file a bug report. See File a bug report or feature request for Mozilla products for details.

There doesn't seem to be any error worded this way in the browser code — could you attach a screenshot for context to help understand where that comes from? Thanks!