The MEGA.nz extension for Firefox was originally designed to optimize file transfers and improve security for users of the MEGA cloud storage platform. However, as of early 2025, the official extension is no longer available in the Firefox Add-ons store because Mozilla's lengthy review process—which can take over four weeks—is incompatible with MEGA's weekly update schedule.
Alternative Add-on: The MEGA Pass password manager extension remains available and supported on Firefox for users looking to manage secure credentials. Recommended Alternatives for Firefox Users
Summary
Better security: Data is decrypted locally within the extension.