[tor-bugs] #16722 [Tor Browser]: New tab "Tiles" feature re-enabled after upgrade

[Tor Bug Tracker & Wiki]

#16722: New tab "Tiles" feature re-enabled after upgrade
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     Reporter:           |      Owner:  tbb-team
  mikeperry              |     Status:  needs_review
         Type:  defect   |  Milestone:
     Priority:  major    |    Version:
    Component:  Tor      |   Keywords:  tbb-5.0,tbb-updater,
  Browser                |  TorBrowserTeam201508R, GeorgKoppen201508R
   Resolution:           |  Parent ID:
Actual Points:           |
       Points:           |
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Comment (by gk):

 Okay. The problem seems to be that you still have the directoryLinks.json
 populated with all the crap once you start 5.0a3. And the data contained
 in it is then used in 5.0a4 even if you have set
 `browser.newtabpage.enhanced` to `false`. (that's my theory according to
 Tor Browser behavior and diffing the profiles of 5.0a3 and 5.0a4 once
 started, I need to doublecheck that in the code)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16722#comment:9>
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