[tbb-bugs] #22540 [Applications/Tor Browser]: Some preferences are reset when browser is closed (even those in user.js)

[Tor Bug Tracker & Wiki]

#22540: Some preferences are reset when browser is closed (even those in user.js)
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     Reporter:  nido                      |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 I am using Tor Browser without Tor as described here:
 https://www.whonix.org/wiki/Tor_Browser_without_Tor

 Until the 7.0 update, these custom preferences could be set (in
 `about:config` or in `user.js` in the `profile.default` directory) and
 would persist when Tor Browser was closed and opened again:

 {{{
 // Disable proxying
 user_pref("network.proxy.socks_remote_dns", false);
 user_pref("network.proxy.type", 0);
 // Disable Tor service
 user_pref("extensions.torlauncher.start_tor", false);
 }}}

 Since the 7.0 update, only the `extensions.torlauncher.start_tor` setting
 persists. The others are reset when Tor Browser is closed, in both Linux
 and Windows. Even setting them in `user.js` has no effect; they need to be
 set manually each time Tor Browser is started. (At least they are applied
 at once so that using Tor Browser without Tor is possible.)

 How can they be made persistent?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22540>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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