Page Visibility Api Block

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.