creo4 config.pro option documentation for: WINDOWS_BROWSER_TYPE 
windows_browser_type
ie_browser
*
, chromium_browser
Configures the Creo
browser to use the embedding engine of the Internet Explorer (IE) or the Chromium-based browser. Both configurations are 64-bit embedded browsers that run in the Creo agent.
ie_browser
- Specifies that the browser uses the IE engine in a Creo agent process initiated from the Creo
process. The windows_browser_type
configuration option is set to ie_browser
by default.
chromium_browser
- Specifies that the browser uses the Chromium-based embedding engine in a Creo agent process initiated from the Creo
process.