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Re: [tor-bugs] #16775 [Tor Browser]: about:preferences is broken with security slider set to "High"

#16775: about:preferences is broken with security slider set to "High"
-------------------------+-------------------------------------------------
     Reporter:  gk       |      Owner:  tbb-team
         Type:  defect   |     Status:  needs_review
     Priority:  normal   |  Milestone:
    Component:  Tor      |    Version:
  Browser                |   Keywords:  tbb-usability, tbb-5.0-regression,
   Resolution:           |  TorBrowserTeam201508R
Actual Points:           |  Parent ID:
       Points:           |
-------------------------+-------------------------------------------------
Changes (by mcs):

 * status:  needs_information => needs_review
 * keywords:  tbb-usability, tbb-5.0-regression => tbb-usability,
     tbb-5.0-regression, TorBrowserTeam201508R


Comment:

 Replying to [comment:7 gk]:
 > We only need to allow the about: scheme for this bug, right? If so, this
 is fine to me. Generally, I am very hesitant to water down our "High
 Security" mode. We know that things are breaking in this mode and users
 ought to do the same. I don't feel the usability in this mode is so bad at
 the moment that we should jump off the cliff allowing chrome: and
 resource: (too) and see what happens.

 OK.  Whitelisting based on the top-level page turned out to be somewhat
 messy (for example, some SVG images are loaded as CSS background images,
 and therefore we need to extract the top document from the channel's load
 context).  We also added some debug printfs because we found them useful
 for verifying correct behavior.  Here is the patch:

 https://gitweb.torproject.org/user/brade/tor-
 browser.git/commit/?h=bug16775-01&id=0b4c8b589077d054b60a609871dd023bc4d9c444

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16775#comment:8>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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