Guide
Guide
Fix 'Service Worker' High CPU Usage in Chrome
Fix 'Service Worker' High CPU Usage in Chrome
Feb 6, 2026
Feb 6, 2026
Modern websites install "Service Workers", scripts that run in the background even after you close the tab (to handle push notifications or offline sync). Often, these workers get stuck in a loop, appearing in Task Manager as "Service Worker: https://youtube.com" consuming 10-20% CPU constantly.
Modern websites install "Service Workers", scripts that run in the background even after you close the tab (to handle push notifications or offline sync). Often, these workers get stuck in a loop, appearing in Task Manager as "Service Worker: https://youtube.com" consuming 10-20% CPU constantly.
The Manual Fix
The Manual Fix
chrome://serviceworker-internals/, find the buggy site, and click Unregister.chrome://serviceworker-internals/, find the buggy site, and click Unregister.The Automated Fix
The Automated Fix
SuperchargeBrowser creates a boundary. Our Script Control module can throttle the execution context of these workers. Furthermore, our Privacy/Blocking engine often blocks the registration of Service Workers from tracking domains (like push notification spammers) entirely.
SuperchargeBrowser creates a boundary. Our Script Control module can throttle the execution context of these workers. Furthermore, our Privacy/Blocking engine often blocks the registration of Service Workers from tracking domains (like push notification spammers) entirely.
Technical Root Cause Analysis
Service Workers are intended to be ephemeral (wake up, do task, sleep).
- The Bug: Poorly coded workers keep a "Keep-Alive" connection open to the server, polling for notifications every second.
- The Impact: This prevents the CPU from idling.
- The Fix: By blocking the network requests associated with these polls, SuperchargeBrowser forces the worker to idle, saving your battery.
Technical Root Cause Analysis
Service Workers are intended to be ephemeral (wake up, do task, sleep).
- The Bug: Poorly coded workers keep a "Keep-Alive" connection open to the server, polling for notifications every second.
- The Impact: This prevents the CPU from idling.
- The Fix: By blocking the network requests associated with these polls, SuperchargeBrowser forces the worker to idle, saving your battery.
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