[tor-bugs] #21923 [Applications/Tor Browser]: Allowing only HTTPS JavaScript on the medium security slider level is broken

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#21923: Allowing only HTTPS JavaScript on the medium security slider level is
broken
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Critical                             |     Resolution:
 Keywords:  noscript, tbb-usability-website,     |  Actual Points:
  ff52-esr                                       |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by cypherpunks):

 16:02:59.098 Error: Only restartless (bootstrap) add-ons can be installed
 from sources:
 Stack trace:
 this.XPIProvider.installAddonFromLocation<@resource://gre/modules/addons/XPIProvider.jsm:4151:13
 TaskImpl_run at resource://gre/modules/Task.jsm:319:42
 Handler.prototype.process at resource://gre/modules/Promise.jsm ->
 resource://gre/modules/Promise-backend.js:932:23
 this.PromiseWalker.walkerLoop at resource://gre/modules/Promise.jsm ->
 resource://gre/modules/Promise-backend.js:813:7
 this.PromiseWalker.scheduleWalkerLoop/<@resource://gre/modules/Promise.jsm
 -> resource://gre/modules/Promise-backend.js:747:11
  1 controls.js:63:9
         loadAddonFromFile/<
 resource://devtools/client/aboutdebugging/components/addons/controls.js:63:9
         Handler.prototype.process resource://gre/modules/Promise-
 backend.js:935:21
         this.PromiseWalker.walkerLoop resource://gre/modules/Promise-
 backend.js:813:7
         this.PromiseWalker.scheduleWalkerLoop/< resource://gre/modules
 /Promise-backend.js:747:11

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21923#comment:5>
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