[418tpot]

You can do this with vanilla Firefox using policies.json[1]. Check out `DisableAppUpdate` attribute.

If you're using Firefox from nixpkgs this is already disabled by default[2].

[1]: https://support.mozilla.org/en-US/kb/customizing-firefox-usi...

[2]: https://github.com/NixOS/nixpkgs/blob/nixos-24.11/pkgs/appli...