[sle15sp1][desktop] Integrating of fix for openQA firefox test cases issues.
We had firefox needles and scripts rebasing in the past couple of days, while the subsequent cases do not yet work very well.
So I am opening this issue to track firefox scripting in Desktop Application group. Let's integrate everything here until the full solution is provided.
I am putting it in you queue :-) Please feel free to split them into small tasks, if the failed reasons are too complicated to handle with quick fixes. Thank you!