Questions to ask yourself

Can I reproduce it?

  1. Every time?
  2. Intermittently? If yes - how frequently?
  3. With a clean profile* (same channel/build)?
  4. With a clean profile* (different channels - most recent build)?

Being able to reproduce a bug only in certain channels (i.e.: in Nightly but not Aurora) is useful for knowing where the regression has occurred and allows developers to more easily uncover the root cause.

‘*’ Clean profile: when you launch FF with the profile manager, create a ‘throwaway’ profile to test the bug with so you know you’re starting with no addons, plugins, or other differences from a new installation of Firefox.