[tbb-bugs] #13247 [Tor Browser]: meek profile error after browser restarts (e.g., after update or add-on installation)

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#13247: meek profile error after browser restarts (e.g., after update or add-on
installation)
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     Reporter:  mcs          |      Owner:  tbb-team
         Type:  defect       |     Status:  new
     Priority:  normal       |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:  meek, tbb-usability
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by mcs):

 Kathy and I poked at this a little more and we think we found the root
 cause:  before restarting, Firefox sets some environment variables to tell
 it things like where the profile is, and those are inherited by the meek
 helper firefox process.  If you examine the environment of the meek
 firefox, you will see things like:
 {{{
 XRE_PROFILE_LOCAL_PATH=/Users/.../tb45.app/TorBrowser/Data/Browser/Caches/profile.default
 XRE_PROFILE_PATH=/Users/.../tb45.app/TorBrowser/Data/Browser/profile.default
 etc.
 }}}
 On Mac OS, we added this hack to the tor script to test this theory:
 {{{
 unset NO_EM_RESTART XRE_BINARY_PATH XRE_PROFILE_LOCAL_PATH
 XRE_PROFILE_NAME XRE_PROFILE_PATH X
 RE_START_OFFLINE XUL_APP_FILE
 }}}
 Indeed, the meek restart problem went away.

 Now we just need to decide where to place a proper fix.  Maybe inside
 meek-client-torbrowser?  The list of env vars to clear may be found here:
 http://mxr.mozilla.org/mozilla-
 esr38/source/toolkit/xre/nsAppRunner.cpp#4150

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13247#comment:17>
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