WebNmap is a useful Chrome add-on developed by Rango. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This free tool primarily focuses on collecting domain names and remote IP addresses from developer tools and exporting the collected data as a .txt file.

To get started with WebNmap, simply click on the "Start Collect" button to initiate the tracking of IP addresses and domain names. When you want to stop the tracking, click on the "Stop Collect" button. Please note that it may take 3 to 6 seconds for the collection to completely stop.

Once you have tracked the desired data, you can download a .txt file of the tracked IP addresses by clicking on the "Export IPs" button. Similarly, you can download a .txt file of the tracked domain names by clicking on the "Export Urls" button.

While WebNmap is a handy tool for collecting domain and IP address data, it is important to remember that it is a free tool developed by a beginner. Any technical issues or glitches may require assistance from the developer or other experts in the field. Nevertheless, this tool serves its purpose well and can be a valuable addition to the toolkit of developers and researchers.