When trying to switch windows in Firefox 80, customers will get
RESPONSE
HTTP Status: 400
{
"message": "Expected \\"handle
" to be a string, got [object Undefined] undefined",
"error": "invalid argument"
}
This is resolved by providing the capability:
'geckodriverVersion' : '0.26.0'
If using the legacy JSON Wire protocol, you'll also need to provide the following capability:
'seleniumVersion' : '3.4.0'