[tor-bugs] #10388 [Firefox Patch Issues]: TBB should disable "New Private Window" menu option if disk history is disabled

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#10388: TBB should disable "New Private Window" menu option if disk history is
disabled
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 Reporter:  mikeperry             |          Owner:  mikeperry
     Type:  defect                |         Status:  new
 Priority:  major                 |      Milestone:
Component:  Firefox Patch Issues  |        Version:
 Keywords:  tbb-usability         |  Actual Points:
Parent ID:                        |         Points:
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 Because we use browser.privatebrowsing.autostart as defense in depth
 against disk leaks, "New Private Window" is equivalent to "New Window".
 This can be confusing to users who will expect their "New Private Windows"
 to be isolated from their normal TBB state, especially since the UI hints
 are different for these windows.

 We should probably patch Firefox to hide this menu option if
 browser.privatebrowsing.autostart is set. This seems like something
 Mozilla should be interested in picking up.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10388>
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