If the extension stops working after a browser update, the local file data might be corrupted.
Last updated: October 2025. Information is accurate for Internet Download Manager version 6.42 and Chromium browsers version 120+.
Open Google Chrome. Type chrome://extensions/ into the address bar and press . Alternatively, click the three vertical dots in the top-right corner, hover over Extensions , and select Manage Extensions . Step 2: Enable Developer Mode
Open File Explorer and navigate to the IDM folder mentioned above. idmgcext.crx
Chrome automatically disables sideloaded extensions for security reasons. To prevent this, you must switch to the official from the Chrome Web Store (available now as of 2022). The store version does not get disabled.
: In the Chrome Web Store, this extension is officially called the IDM Integration Module .
Despite its legitimate origin, there are two main risks associated with this file: If the extension stops working after a browser
Modern browsers block extensions from running on all sites by default.
: This is usually due to changes in Chrome's security policies, where the browser no longer recognizes the .crx format.
<!DOCTYPE html> <html> <head> <title>IDM GC Ext</title> <style> body width: 200px; height: 100px; font-family: Arial, sans-serif; text-align: center; Open Google Chrome
Google occasionally blocks extensions not from the Web Store. If this happens, ensure you are using the latest version of IDM from the official website.
Many users do not realize that the IDM Integration Module is also hosted on the official Chrome Web Store. If the drag-and-drop method fails due to browser security restrictions, you can install it directly online.