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Mozilla Launches New System to Detect Firefox Crypto Drainer Add-Ons

  • Mozilla launched a new system in 2025 to detect and block malicious Firefox add-ons that steal cryptocurrency from users' wallets.
  • This system responds to widespread losses exceeding $494 million last year, caused by scam extensions that impersonate trusted crypto wallets and steal private keys.
  • The detection uses automated risk profiling to flag suspicious extensions on addons.mozilla.org, triggering human reviews that remove confirmed scams before wider attacks occur.
  • Add-Ons Operations Manager Andreas Wagner highlighted the ongoing challenges his team faces as developers continually try to bypass detection, and he recommended that users install only official wallet extensions directly linked by the service providers.
  • Mozilla's system aims to reduce crypto wallet theft by catching dangerous extensions early, potentially limiting users' irreversible losses and improving Firefox security.
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WebsCrypto broke the news in on Tuesday, June 3, 2025.
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