I’ve set up a WPT Private Instance which uses the Windows (wptagent) AMI to run tests. Chrome works fine, but if I try to launch a test with Firefox, I get a result of:
The testing completed but failed.
Invalid browser - Firefox
First View: Test Error: Invalid browser - Firefox
This occurs in all regions I have tested - us-west-2, eu-west-1, and ap-northeast-1.
If I remote desktop to the Agent, Firefox is installed and otherwise functional.