Adjust Tor Browser updates settings for 9.0

See attached screenshot → I’m wondering what will happen when one starts an older Tails, before upgrading, and a new Tor Browser is available. I bet the user will be told that their Tor Browser is outdated. An update could even be attempted and fail due to AppArmor + DAC permissions. All this could make UX pretty painful around the time when we release 4.1.

I’ve read on tb-enterprise@mozilla.org that prefs to disable updates were removed from Firefox (and Thunderbird) 68.

Apparently the new way to handle this is to add a file named policies.json in the distribution folder, with content like:

 {
   "policies": {
     "DisableAppUpdate": true
   }
 }

For details, see:

• https://support.mozilla.org/en-US/kb/customizing-firefox-using-group-policy-windows

• https://bugzilla.mozilla.org/show_bug.cgi?id=1578669

• https://github.com/drlellinger/thunderbird-policies

• https://searchfox.org/comm-central/source/mail/components/enterprisepolicies/schemas/policies-schema.json

I expect Debian’s firefox and thunderbird 68 package has done this already so we can probably steal the solution from there.

Attachments

• 

Parent Task: #16356 (closed)

Related issues

• Related to #17159
• Blocks #16209

Original created by @intrigeri on 17114 (Redmine)