Mozilla Firefox/Thunderbird “legacy” addons (#E6F3)

News from the friendly crackpots over at Mozilla:



You are receiving this email because you are listed as a developer of a legacy add-on on (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
You have received this email because you are a registered add-on developer on and you have at least one legacy extension associated with your account. If you do not want to receive these updates about your AMO account and legacy extensions, please sign in to and remove your legacy extensions.
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Mozilla Privacy Notice

Well, thank you very much. Firefox is down to 10% global market share (from…40?) because of massive design fails, and now you idiots will halve that again with the stupid forced Webex addon thing and kicking out all “legacy” XUL addons. Good luck, I can stay basically forever on FF 52.9 and TB60. Or I can change to Chrome, like half of the world has already done. Great idea to prefer hated UI redesign over speed improvements, fixes of memory holes or just plain integration of must-have features that had to be delivered for ages by popular addons.

Here’s the summary for Thunderbird:
* If you’re using up to TB57 (most people should be at TB52 ESR), use version 64.3 from the archive. Even though Mozilla may state that there are no compatible versions: There ARE. 64.4+ will NOT work.

* If you’re using TB58+ (TB60 is current as of now, which was released on August 6th), use version 64.4 or newer, basically whatever your TB will offer you for installation. 64.3- will NOT work.

How did I know there’s a new Thunderbird release? Easy! Just watch the blog access numbers go through the roof:

(This post wraps up the former #E6/#E6F1 and #E6F2 posts that still contain the files for manual downloading…let’s say for the unlikely event that Mozilla will take them down as well.)

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