Private Instance - Chrome - URL not loading when triggered with proxy


I am trying to invoke chrome with proxy. Earlier versions worked fine with the below command.

options=’–load-extension="%WPTDIR%\extension" --proxy-pac-url=“file://c:/Proxy/accelerated_pac_base.pac” --user-data-dir="%PROFILE%"’

But after updating the chrome and WPT, it is not working. Outside the network without proxy, it is working fine.
Please let me know, If I am missing something.

Try putting just the --proxy-pac-url option into a “command-line” setting. i.e:


The options= setting was killed because it was too easy to break the user-data-dir and extension stuff, both of which aren’t optional.

Thanks Patrick…Now I am getting Failed to load extension from C:\Program Files (x86)\Google\Chrome SxS\Applications\56.0.2924.87%WPTDIR%\extension. Manifest file is missing or unreadable

Thanks Patrick…Now it is working fine. Thank You for your support.

What was the exact resolution to get this working?

When I use the Chrome command line from the web under Advanced Settings:

This works as expected. Any attempt to add this to the wptdriver.ini does not work. Oddly it opens a number of tabs where it appears to be getting script commands. However, the commands are getting treated as URLs.


My goal is to have this as default and not have to enter it for each test through the web ui.

I too stuck in the same issue, i.e., giving pac url as command-line in webdriver.ini file. it is not working but the same is working when provided from the web under advanced settings.

please suggest solution