• Go to any pull request
• Pick some file to review and click on it
  The file won't open in the right pane, the current file reloads

It's a specific issue with FF only, reported on Firefox 41 and 42 on Windows 7 EN x64. Works properly in Chrome.

Please see attached video showing how it behaves.

We're considering update to 4+ so hopefully it's resolved already. Thank you