{"UUID":"5b73c1c1-8ec4-4901-91f3-0d993f582dd4","URL":"https://hacks.mozilla.org/2019/07/add-ons-outage-post-mortem-result/","StartTime":"0001-01-01T00:00:00Z","EndTime":"0001-01-01T00:00:00Z","Categories":["postmortem"],"Company":"Mozilla","Product":"","Description":"Most Firefox add-ons stopped working around May 4th 2019 when a certificate expired. Firefox requires a valid certificate chain to prevent malware. About nine hours later, Mozilla pushed a privileged add-on that injected a valid certificate into Firefox's certificate store, creating a valid chain and unblocking add-ons. This disabled effectively all add-ons, about 15,000, and the resolution took approximately 15-21 hours for most users. Some user data was lost. Previously Mozilla [posted](https://hacks.mozilla.org/2019/05/technical-details-on-the-recent-firefox-add-on-outage) about the technical details."}