If the extension is essential to your workflow, MEGA continues to offer fully supported, up-to-date extensions for Google Chrome and Microsoft Edge . meganz/web-extension: mega.nz browser extensions - GitHub
As of , the official status of the Firefox extension is as follows: mega nz extension firefox
The extension stores MEGA’s source code (HTML, CSS, and JavaScript) locally on your machine. This eliminates the need to download and verify the site's code from the web every time you visit, leading to significantly faster page loads. If the extension is essential to your workflow,
The extension code remains open-source on the MEGA GitHub repository. Advanced users can theoretically load it in "developer mode" via about:debugging , though it may require manual patching to remain functional. The extension code remains open-source on the MEGA
By running source code locally rather than from a remote server, the extension offers a more secure environment for MEGA's zero-knowledge encryption to operate. Current Availability Status
MEGA has officially ceased support for the Firefox extension due to the 4-week review delay imposed by Mozilla.
If you primarily use Firefox and need the performance of the MEGA extension, consider these official alternatives: