For example, suppose you have a global variable defined in your execution profiles (perhaps with different values in each one), whose value is a Chrome setting:
G_CHROME_USER_DATA_DIR=‘user-data-dir=/Users/myuser/myprofile’
Doing so, in Project Settings > Desired Capabilities > Custom (Value column) I could pass this setting to my customized Chrome:
Chrome: {args=[${G_CHROME_USER_DATA_DIR}]}
I think this feature makes more easy to create projects that works in different OSes with minimal changes.
Thanks