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

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed May 11 22:40:09 UTC 2016


#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

--

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19037#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online


More information about the tbb-bugs mailing list