Open With Internet Download Manager is a Firefox browser extension designed to enhance the downloading experience by integrating seamlessly with the Internet Download Manager (IDM) application. This add-on allows users to easily open and download items directly using IDM, provided that the native-client patch is installed to enable communication between the browser and the IDM application on the system. Users must ensure they have IDM installed before utilizing this extension, which simplifies the download process through a convenient context menu option.

To set up the extension, users need to follow specific installation steps, including downloading a patch from GitHub to connect the add-on with the IDM application. The options page of the add-on allows users to verify the correct path to the IDM executable, ensuring smooth operation. Additionally, the add-on supports various input arguments for enhanced download management, giving users flexibility in how they initiate downloads. Overall, this extension is a useful tool for anyone looking to optimize their file downloading process.