[QE-1108] Fixing parameter name
[QE-1108] Correcting parameter name (again)
[QE-1108] Fix parameter name
[QE-1108] Fixing bug due to wrong name
[QE-1108] Minor improvements
[QE-1108] Fixing race condition
[QE-1108] Adding support for firefox
[QE-1108] Fixing thread count around firefox/chrome
[QE-1022] Addressing race condition
Fixing ami sizes