Firefox
Mozilla announces switch to disable all Firefox AI features
In response to user feedback on AI integration, Mozilla announced today that the next Firefox release will let users disable AI features entirely or manage them individually. The new “Block AI enhancements” toggle will be available in Firefox 148 on February 24 and will help block current and future generative AI features in the desktop […]
Malicious GhostPoster browser extensions found with 840,000 installs
Another set of 17 malicious extensions linked to the GhostPoster campaign has been discovered in Chrome, Firefox, and Edge stores, where they accumulated a total of 840,000 installations. The GhostPoster campaign was first reported by Koi Security researchers in December. They found 17 extensions that were hiding malicious JavaScript code in their logo images, which monitored browser activity and planted […]
GhostPoster attacks hide malicious JavaScript in Firefox addon logos
A new campaign dubbed ‘GhostPoster’ is hiding JavaScript code in the image logo of malicious Firefox extensions with more than 50,000 downloads, to monitor browser activity and plant a backdoor. The malicious code grants operators persistent high-privilege access to the browser, enabling them to hijack affiliate links, inject tracking code, and commit click and ad fraud. […]
Mozilla Firefox gets new anti-fingerprinting defenses
Mozilla announced a major privacy upgrade in Firefox 145 that reduces even more the number of users vulnerable to digital fingerprinting. The new protections will initially be available only in Private Browsing Mode and Enhanced Tracking Protection (ETP) Strict mode. After testing and optimization, they will be enabled by default in the Firefox web browser. […]
Mozilla: New Firefox extensions must disclose data collection practices
Starting next month, Mozilla will require Firefox extension developers to disclose whether their add-ons collect or share user data with third parties. The devs will be required to disclose any new extension’s data practices in the manifest.json file using a dedicated browser_specific_settings.gecko.data_collection_permissions key beginning November 3, 2025. Mozilla will also require all extension developers to […]
Mozilla now lets Firefox add-on devs roll back bad updates
Mozilla has announced a new feature that enables Firefox extension developers to roll back to previously approved versions, allowing them to quickly address critical bugs and issues. Once the latest extension version is reverted, users will no longer be able to install it. If automatic updates are enabled, the web browser will also automatically revert […]
Wave of 150 crypto-draining extensions hits Firefox add-on store
A malicious campaign dubbed ‘GreedyBear’ has snuck onto the Mozilla add-ons store, targeting Firefox users with 150 malicious extensions and stealing an estimated $1,000,000 from unsuspecting victims. The campaign, discovered and documented by Koi Security, impersonates cryptocurrency wallet extensions from well-known platforms such as MetaMask, TronLink, and Rabby. These extensions are uploaded in a benign form […]
Dozens of fake wallet add-ons flood Firefox store to drain crypto
More than 40 fake extensions in Firefox’s official add-ons store are impersonating popular cryptocurrency wallets from trusted providers to steal wallet credentials and sensitive data. Some of the extensions pretend to be wallets from Coinbase, MetaMask, Trust Wallet, Phantom, Exodus, OKX, Keplr, and MyMonero, and include malicious code that sends stolen information to attacker-controlled servers. Researchers […]
Mozilla launches new system to detect Firefox crypto drainer add-ons
Mozilla has developed a new security feature for its add-on portal that helps block Firefox malicious extensions that drain cryptocurrency wallets. According to a recent blog post, Mozilla’s new security system creates risk profiles for each submitted wallet extension and triggers automated risk alerts if a pre-defined threshold is exceeded. These alerts will prompt human […]
Mozilla releases Firefox 139.0.1 update to fix artifacts on Nvidia GPUs
Mozilla has rolled out an emergency Firefox 139.0.1 update after the Tuesday release caused graphical artifacts on PCs with NVIDIA GPUs. Firefox 139 shipped on May 27 with features like Full-Page Translations, but it also caused graphical artifacts when browsing the web in Firefox. In a Reddit thread, several Firefox users complained that videos would flicker or flash. […]