f your user is using Google Chrome or Microsoft Edge, do the following:
The browser version used in this example is Google Chrome 96.0.4664.45 - you might find the settings change in wording.
Enter chrome://net-export/ into the address bar.
In the Options menu, make sure Strip private information is selected, then click Start Logging to Disk.
In the Save As window, click Save to save the log as a JSON file.
Click Stop Logging.
Click Show File.
Open the saved JSON file and search for the keyword proxySettings.
You see the URL of the PAC file configured to the user's browser, similar to the following example:
"proxySettings":{"effective":{"pac_url":"http://pac.zscalerbeta.net/zscalerbeta.net/proxy.pac"},
"original":{"pac_url":"http://pac.zscalerbeta.net/zscalerbeta.net/proxy.pac"}}