Block Ctrl W is a free Chrome add-on developed by Lawrence Lin. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools. This useful program allows users to block the keyboard shortcut "Ctrl + W" which is commonly used to close tabs in the Chrome browser.

To use Block Ctrl W, simply add it to your Chrome browser as an extension. Once installed, open the "chrome://extensions/shortcuts" page and locate the "Block Ctrl W" option. Click on the "Edit" button and press the "Ctrl + W" buttons simultaneously. This will prevent the browser from closing tabs when the keyboard shortcut is used.

With Block Ctrl W, users can eliminate the accidental closing of tabs with a simple keyboard shortcut. It provides a convenient way to ensure that important tabs are not closed unintentionally, saving time and frustration.

Please note that Block Ctrl W is only compatible with the Chrome browser and does not support other browsers or platforms.