Update to jQuery 3.x
I received an email from Mozilla:
Hello,
You’re receiving this message because you’re an add-on developer registered on AMO (addons.mozilla.org) and and you are using jQuery 2.x in at least one of your add-ons. We want to inform you about the upcoming deprecation of that version.
jQuery 2.x is no longer maintained and contains vulnerabilities that could lead to security issues in add-ons. Effective immediately, the validation process will warn you if jQuery 2.x is found during the submission of a new version or add-on. After September 1, 2018, no new submissions using jQuery 2.x will be accepted.
Please upgrade to jQuery 3.x as soon as possible. Refer to the upgrade guide at https://jquery.com/upgrade-guide/3.0/ for more information.
Regards,
The Add-ons Team