[tor-bugs] #26884 [Applications/Tor Browser]: Update preferences.xul to make it work on mobile

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#26884: Update preferences.xul to make it work on mobile
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 Reporter:  igt0                                 |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-torbutton, TorBrowserTeam201808  |  Actual Points:
Parent ID:  #26531                               |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by igt0):

 Rebased code:

 **Bug 26884 - Part 1: Move show_torbrowser_manual and
 get_general_useragent_locale to utils**
 https://github.com/igortoliveira/torbutton/commit/9757d18579fd63340cd2877ea0b26da9cb61eb91

 **Bug 26884 - Part 2: Create mobile security slider**
 https://github.com/igortoliveira/torbutton/commit/9b194a0a6e8ea659d59024796f5df33f4b0c327c

 **Bug 26884 - Part 3: Remove optionsURL from install.rdf**
 https://github.com/igortoliveira/torbutton/commit/cc90adc868bfaebe298db09155a9412334e1dfa3

 Here is the branch:
 https://github.com/igortoliveira/torbutton/commits/26884-v4

 Replying to [comment:17 gk]:
 > Thanks, looks good. We are close here. Could you do a final rebase of
 your patches against `master`? There are a bunch of conflicts due to the
 desktop onboarding/`about:tor`-changes.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26884#comment:18>
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