Proxy-url-file-3a-2f-2f-2f Link -

Services like Google Docs Viewer or Microsoft Office Online often use proxy URLs to render documents. If you try to open a local file ( C:\Users\Documents\test.pdf ) through one of these web tools, the browser generates a "proxy-url-file" path to bridge the gap between the web app and your local machine. 2. Corporate Security Gateways

Routing requests for locally stored data files. proxy-url-file-3A-2F-2F-2F

Setting up browser profiles for specialized network traffic. How it Works in Network Traffic Services like Google Docs Viewer or Microsoft Office