[tor-bugs] #20019 [Applications/Tor Browser]: Proposal for TOR Browser extension

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#20019: Proposal for TOR Browser extension
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 Reporter:  SECUSO_Kristoffer         |          Owner:  tbb-team
     Type:  enhancement               |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Changes (by teor):

 * status:  new => needs_information


Comment:

 This extension requires extended validation SSL certificates to show the
 green status.
 Otherwise it shows a yellow status. For HTTP, it shows a red status. This
 is not an accurate representation of the security of Tor onion sites
 (hidden services) - even if they use HTTP, they're secure (as long as the
 address is correct).

 SECUSO_Kristoffer, do you have plans to add a check for onion sites to
 your extension?

 Also, it chooses one of ten random images per-user. This could be a
 fingerprinting vector:
 * is it loaded from a remote site?
 * what happens when a Tor Browser user selects "new identity" (or quits
 and reopens the browser)?
   * do we choose a new image at random, destroying the utility of this
 feature?
   * or do we preserve the image, providing a fingerprinting vector?
   * or do we just use one symbol for Tor Browser users? Then it would be
 easy to fake based on the user agent.

 What would you do about this issue?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20019#comment:2>
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