Page Visibility API Blocker

Tracking since Apr 1, 2026.

Changelog

• May 4, 2026
  description

  Page Visibility API Blocker prevents websites from detecting when your tab is hidden or minimized. When enabled, websites will always believe they are visible, preventing them from pausing videos, stopping animations, or reducing functionality when you switch tabs.
  
  FEATURES:
  • Toggle blocking on/off with a single click
  • No data collection - fully private
  • Works on all websites
  • Local storage only
  • Open source code
  
  PRIVACY:
  This extension collects no data. All functionality operates locally in your browser. No information is transmitted, stored externally, or shared with any third parties.
  
  USE CASES:
  • Keep videos playing when switching tabs
  • Prevent web applications from pausing or throttling
  • Test website behavior with constant visibility
  
  OPEN SOURCE:
  Full source code available at: https://github.com/Transwarp8/PageVisibilityBlocker
  
  Simply click the extension icon to toggle blocking on or off. Reload active pages for changes to take effect.

  Page Visibility API Blocker prevents websites from detecting when your tab is hidden or minimized. When blocking is enabled, supported websites see the page as visible, which can help prevent videos, animations, timers, and web apps from pausing or changing behavior when you switch tabs.
  
  FEATURES:
  • Block the Page Visibility API so pages report as visible
  • Block related focus/blur detection signals
  • Toggle blocking globally from the extension popup
  • Enable or disable blocking for the current site
  • Manage always-block and never-block site lists from the options page
  • Works automatically after matching tabs reload
  • No data collection - fully private
  • Settings stored locally in your browser
  • Open source code
  
  PER-SITE CONTROLS:
  Use the popup to override the global default for the current site, or use the options page to maintain hostname lists:
  • Always block on selected sites
  • Never block on selected sites
  
  PRIVACY:
  This extension collects no data. All functionality operates locally in your browser. No browsing history, page content, settings, or personal information is transmitted, stored externally, or shared with any third parties.
  
  USE CASES:
  • Keep videos playing when switching tabs
  • Prevent web apps from pausing, throttling, or changing behavior when hidden
  • Test website behavior with constant page visibility
  • Apply blocking only where you need it with per-site rules
  
  OPEN SOURCE:
  Full source code available at: https://github.com/Transwarp8/PageVisibilityBlocker
  
  Click the extension icon to toggle blocking globally or configure the current site. Use the options page to manage site lists in bulk.

• May 4, 2026
  host_permissions

  (empty)

  <all_urls>

• May 4, 2026
  permissions

  storage

  storage, scripting

Permissions & access

Permissions

storagescripting

Host access

<all_urls>

Screenshots

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