Files that contain the .crdownload file extension are associated with the Google Chrome Internet browser. The files with the .crdownload file suffix store the contents of partial file downloads that are being performed with the Chrome Web browser.
The Google Chrome Internet browser was created by Google to compete with the other popular website browsers, such as Firefox and Internet Explorer and was released in 2008.
When the Google Chrome Web browser is downloading a file, the incomplete download will be saved with the .crdownload file extension until the file has completed the download process. Once the download has been completed by the browser, the file will be renamed with the proper file extension.