Re: [tor-bugs] #19037 [Applications/Tor Browser]: Suppress content access to page visibility API

[Tor Bug Tracker & Wiki]

#19037: Suppress content access to page visibility API
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:  new
Component:  Applications/Tor Browser |  Milestone:
 Severity:  Normal   |Version:
 Keywords:  tbb-linkability, | Resolution:
  TorBrowserTeam201605   |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Description changed by arthuredelstein:

Old description:

> The `document.visibility` property and the `visibilitychange` event let
> content know if the user has selected or deselected a tab. If the user
> switches from tab A to tab B, then tab A can observe a "hidden" event at
> the same time that tab B receives a "visibile" event. So it seems
> potentially useful to suppress this information.
>
> See https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API

New description:

 The `document.visibility` property and the `visibilitychange` event let
 content know if the user has selected or deselected a tab. If the user
 switches from tab A to tab B, then tab A can receive a "hidden" event at
 the same time that tab B receives a "visible" event. So it seems
 potentially useful to suppress this information.

 See https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API

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[tor-bugs] #19037 [Applications/Tor Browser]: Suppress content access to page visibility API

[Tor Bug Tracker & Wiki]

#19037: Suppress content access to page visibility API
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-team
 Type:  defect   | Status:  new
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor |Version:
  Browser|   Keywords:  tbb-linkability,
 Severity:  Normal   |  TorBrowserTeam201605
Actual Points:   |  Parent ID:
   Points:   |   Reviewer:
  Sponsor:   |
-+-
 The `document.visibility` property and the `visibilitychange` event let
 content know if the user has selected or deselected a tab. If the user
 switches from tab A to tab B, then tab A can observe a "hidden" event at
 the same time that tab B receives a "visibile" event. So it seems
 potentially useful to suppress this information.

 See https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API

--
Ticket URL: 
Tor Bug Tracker & Wiki 
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