Today we are pushing out an automatically downloaded test add-on for Firefox Beta users. The add-on itself does not change the behavior of Firefox in any way, and should be automatically uninstalled in the next week. In the meantime it will, however, be visible in the Add-ons Manager as “Mozilla Firefox hotfix”.
We plan to use this “add-on hotfix” feature to deliver individual fixes to Firefox users between releases. The purpose of this week’s test is to collect metrics that verify the feature is working as expected.