diff --git a/doc/source/developer/javascript.rst b/doc/source/developer/javascript.rst
index 7a1c5d3975..b471f7dfac 100644
--- a/doc/source/developer/javascript.rst
+++ b/doc/source/developer/javascript.rst
@@ -192,3 +192,7 @@ As long as `yarn`_ is installed, the installation of zuul will run
 .. _React: https://reactjs.org/
 .. _Patternfly: https://www.patternfly.org/
 .. _create-react-app: https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md
+
+In some cases there is the need to disable the service worker which does
+advanced caching. In order to do that set the environment variable
+``REACT_APP_DISABLE_SERVICE_WORKER=true`` during installation.
diff --git a/web/src/registerServiceWorker.js b/web/src/registerServiceWorker.js
index 4f95314426..3180adeb70 100644
--- a/web/src/registerServiceWorker.js
+++ b/web/src/registerServiceWorker.js
@@ -21,6 +21,11 @@ const isLocalhost = Boolean(
 )
 
 export default function register () {
+  if (process.env.REACT_APP_DISABLE_SERVICE_WORKER === 'true') {
+    console.log('Disabled service worker')
+    return
+  }
+
   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
     // The URL constructor is available in all browsers that support SW.
     const publicUrl = new URL(process.env.PUBLIC_URL, window.location)