[tor-bugs] #3455 [Tor Browser]: Tor Browser should set SOCKS username for a request based on first party domain

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#3455: Tor Browser should set SOCKS username for a request based  on first party
domain
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     Reporter:           |      Owner:  mikeperry
  mikeperry              |     Status:  needs_review
         Type:           |  Milestone:  TorBrowserBundle 2.3.x-stable
  enhancement            |    Version:
     Priority:  major    |   Keywords:  tbb-linkability, tbb-usability,
    Component:  Tor      |  MikePerry201407R, tbb-firefox-patch
  Browser                |  Parent ID:  #5752
   Resolution:           |
Actual Points:           |
       Points:           |
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Comment (by gk):

 Some comments on Part 3 (which looks good to me):

 1) "The filterFunction should expect two arguments:
 filterFunction(aChannel, aProxy)": you probably just meant `aChannel` and
 `aProxy` being those arguments.
 2) "Returns a zero-argument function that will unregister the filter.": I
 wonder where this is going to happen? I think you can omit that as
 according to MDN:
 {{{
 All filters will be automatically unregistered at XPCOM shutdown.
 }}}
 That said, what I like to see getting unregistered/removed on shutdown are
 observers although I realize that the common style in Torbutton seems to
 be ignoring this thing... :) So, feel free to keep the observer for
 profile-after-change as-is.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3455#comment:46>
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