# The Firefox extension is now signed by Mozilla 2026-10-20 · Product > Firefox accepts version 0.3.1 of the extension because Mozilla signed it as an unlisted add-on. Firefox rejected the unsigned package as "not verified". The extension page now offers a signed file for version 0.3.1, signed by Mozilla as an unlisted add-on. The page shows the signed file only when it matches the current extension version. Otherwise the source download stays a developer preview. Install the signed file from the [extension page](https://zerolog.ch/extension). It needs Firefox 140 or newer and stays installed after a restart. It does not update itself, so a new version means installing the new signed file.