This behaviour can be disabled by blacklisting Firefox from APT's unnattended upgrades. I wrote[0] something up on this last year if anyone is interested. [0]:

This behaviour can be disabled by blacklisting Firefox from APT's unnattended upgrades. I wrote[0] something up on this last year if anyone is interested. [0]: https://hth.is/2023/01/10/blacklist-firefox/ https://hth.is/2023/01/10/blacklist-firefox/