Over the past two weeks, Mozilla has reviewed and banned 197 Firefox add-ons because they were executing malicious code. The malicious Firefox add-ons were found stealing user data and for this reason, they were removed from the Mozilla Add-on (AMO) portal.
Mozilla also disabled the malicious add-ons in the browsers of the users who have already installed them.
The apps were using obfuscation to hide their source code and were downloading and executing code from a remote server, a behavior that violates the policy of the portal. Downloading code from a remote server could allow threat actors to execute malicious code within the browser
Most of the banned apps have been developed by 2Ring, a provider of B2B software.
The organization also banned for malicious behavior other 30 add-ons.
Firefox also reported the case of an add-on named Fake Youtube Downloader was spotted attempting to install a malware in users’ browsers.
Mozilla also banned Firefox Add-ons like
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