Hello, In case you are an add-on developer or use Firefox add-ons in your deployments please read through this communication from the Firefox add-ons team regarding changes to the extensions and themes signing:
Mozilla has recently upgraded the signing <https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Distribution> for Firefox extensions and themes to provide a stronger signature. All extension versions signed after April 5, 2019 have this signature, and we plan to deprecate the old signature with Firefox 70 <https://wiki.mozilla.org/Release_Management/Calendar>. Firefox 70 will become available on pre-release channels <https://www.mozilla.org/firefox/channel/desktop/> starting with Nightly <https://www.mozilla.org/firefox/nightly/all/> on July 7 and Beta <https://www.mozilla.org/firefox/beta/all/> on September 3, and will be released on October 22. In order for your extension to continue working for users who upgrade to Firefox 70, please sign into your developer account at addons.mozilla.org and upload a new version of your extension. This version will be signed with the upgraded signature. Then, make sure your users update to this new version. The new signatures are backwards compatible with older versions of Firefox, including ESR 68 <https://www.mozilla.org/firefox/enterprise/> or ESR60, so all supported versions of Firefox should work with the newly signed versions of your extension. While we expect to support the old signature format on Firefox ESR 68 through its end of life, we do not guarantee it. We recommend that all extensions be re-signed soon with the stronger signature. Regards, The Add-ons Team
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