Mozilla Issues Warning on Phishing Campaign Targeting Add-on Developer Accounts

Mozilla has issued an urgent security warning to Firefox add-on developers following the detection of a sophisticated phishing campaign targeting accounts on the Add-ons Mozilla Organization (AMO) platform.

The alert, published by Scott DeVaney from Mozilla’s Add-ons Community team on August 1, 2025, warns developers to exercise extreme caution when receiving emails purporting to be from Mozilla or AMO.

Phishing Campaign Details

The phishing campaign specifically targets developer accounts on addons.mozilla.org, using deceptive emails that claim account updates are required to maintain access to developer features.

According to the Mozilla warning, these fraudulent emails typically contain variations of the message stating “Your Mozilla Add-ons account requires an update to continue accessing developer features”.

The timing of this warning is particularly significant given Mozilla’s growing extension ecosystem.

The Firefox for Android platform alone has expanded from just over 400 extensions at its December launch to more than ...