Configurable popup blocker that blocks all popup windows by default.
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Ultimate Popup Blocker (or UPB for short) is a lightweight Popup Blocker that aims to block all popup windows by default, (unharmful ones) on a permission model while providing a clean Permission Manager page for easy configuration.
Why another popup blocker?
Built-in browser popup blockers block only the popups that were created automatically via scripts on page load etc. When you click on a button on the page, it won't block it. However, malicious websites can create JS code that will launch the popups whenever you click on any blank space on the page for instance.
How does it work?
In JavaScript, functions are first-order citizens. It means you can store a function in a variable and pass it freely. You can also modify the native functions provided by the browser, like 'window.open'. Here, we override 'window.open' with the script implementation which shows a prompt to open/close any popup windows.
Managing permissions
Use the permission manager provided with Ultimate Popup Blocker to set which websites are trusted to open popups freely.
