An extension which doesn't let you browse social media and Youtube more than few seconds(kept for demonstration purposes). It utilises Web Extension APIs namely alarm, storage and tabs provided by Mozilla. It also comes with a preference page by which you can select which quote is to be loaded.
After N seconds of browsing on social media(facebook, twitter) or youtube (defined as the user not having navigated or switched away from the active tab) it loads a stay focused image quote in browser. It works with every browser(Chrome, Edge, Firefox desktop, Firefox for Android and others).
"N" is set to 6 seconds in this example. Such a short period is chosen to make the extension's behavior more obvious, but this is not recommended in real life. Note that in Chrome, alarms cannot be set for less than a minute. In Chrome:
- if you install this extension "unpacked", you'll see a warning in the console, but the alarm will still go off after 6 seconds
- if you package the extension and install it, then the alarm will go off after a minute.