[tor-bugs] #16931 [Applications/Tor Browser]: Sanitize the add-on blocklist update URL

[Tor Bug Tracker & Wiki]

#16931: Sanitize the add-on blocklist update URL
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 Reporter:  cypherpunks               |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by acat):

 One problem of setting `extensions.blocklist.enabled = false` is that it
 also disables gfx (and plugin) blocklist, and I'm not sure about the
 consequences of not having the GFX blocklist for some users.

 Something we could try is setting `extensions.blocklist.useXML = false`,
 which should enable the `RemoteSetting` implementation of those
 Blocklists. I don't see this one sending all these fields, just `etag` and
 sometimes as the other `RemoteSettings` polls. But I don't know the status
 of that implementation, there must be some reason why it's not enabled by
 default.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16931#comment:8>
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