It may be of interest for those who want to make any local backups of add-ons hosted on their site. As always, if developers are interested in porting to Pale Moon, feel free to contact us, or point developers in the right direction.
Firefox Add-ons Team wrote:Hello,
You are receiving this email because you are listed as a developer of a legacy add-on on addons.mozilla.org (AMO). Mozilla will stop supporting Firefox Extended Support Release (ESR) 52, the final release that is compatible with legacy add-ons, on September 5, 2018.
As no supported versions of Firefox will be compatible with legacy add-ons after this date, we will start the process of disabling legacy add-on versions on AMO. On September 6, 2018, submissions for new legacy add-on versions will be disabled. All legacy add-on versions will be disabled by early October 2018. Once this happens, users will no longer be able to find your legacy versions on AMO.
After legacy add-ons are disabled, you will still be able to port your extension to the WebExtensions APIs. Once your new version is submitted to AMO, users who have previously installed your extension will automatically receive the update and your listing will appear in the gallery.
You can find more information about porting legacy extensions to the WebExtensions API on MDN, and we encourage you to visit our wiki for more information about upcoming development work and how to get in touch with our team if you need any help.
The Add-ons Team