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

– The standard separator between a URI scheme and the path or authority. In a normal URL like https://example.com , the :// indicates the scheme is followed by an authority (hostname). But here, we have something unusual.

So a full example might look like: proxy-url-file:///C:/Users/name/proxy.pac proxy-url-file-3A-2F-2F-2F

Combined, this represents the standard URI scheme for a local file: Common Contexts This specific string format is typically found in: Electron Applications : Used by frameworks (like – The standard separator between a URI scheme

Find the component that is stripping % characters. Look for: proxy-url-file-3A-2F-2F-2F

So %3A%2F%2F%2F decodes to :/// .

If you arrived here searching for proxy-url-file-3A-2F-2F-2F , you are likely debugging a system that you do not fully control. But now you have the decoder ring.