"policies": {
   "DisableAppUpdate": true,
   "AppAutoUpdate": false,
   "BackgroundAppUpdate": false
 }

I want to stop Firefox from silently updating in the background during browsing sessions. When it finishes updating like this, currently open tabs stop working and I can no longer open new tabs. The only fix is to restart Firefox. This is a problem if I am, for instance, going through a set of web forms as the information I enter will then be deleted and I have to start again. When I have used Firefox on Windows, the requirement to restart Firefox to install updates has always been indicated by some change to the settings button on the top right of the window. With Ubuntu, the update is downloaded and installed without any action from my part, and given that it is quite disruptive this is unacceptable. I have tried a number of ways of changing this, none of which work. Under the general settings tab, there are no options for changing the way updates are handled. Settings under about:config appear to do nothing. I have app.update.auto set to false, and app.update.notifyDuringDownload is set to true. I have attempted to circumvent these by setting a policy using the policies.json: { "policies": { "DisableAppUpdate": true, "AppAutoUpdate": false, "BackgroundAppUpdate": false } } None of these have made the slightest change to how Firefox handles updates. I am running Firefox 110.0.1 (64 bit) on Ubuntu 20.04.5 LTS, but I should point out that this has been a problem for the last several years of Firefox versions on the same OS.