Firefox not working

I’m using the webpagetest 2.18. When I test with Firefox, I get the error: Timed out waiting for the browser to start. But other browsers are working well. Any idea? And it’s working well before so I think it may be related to the latest Firefox version 43. Please help!

Here’s the browser settings in wptdriver.ini. The path to the Firefox is correct and I saw the browser is opening at when the test starts. But it does’t open the testing URL and always on this blank page until getting timeout.

exe=“C:\Program Files (x86)\Google\Chrome\Application\chrome.exe”
options=’–load-extension="%WPTDIR%\extension" --user-data-dir="%PROFILE%" --no-proxy-server’

exe=“C:\Program Files (x86)\Mozilla Firefox\firefox.exe”
options=’-profile “%PROFILE%” -no-remote’

exe=“C:\Program Files (x86)\Safari\Safari.exe”

exe=“C:\Program Files (x86)\Internet Explorer\iexplore.exe”

Verified it’s due to the latest Firefox version. Just downgraded the Firefox and it’s working. I think it’s a bug and should be fixed soon. Thanks.

Which version of wptdriver are you running? Updating to the latest should solve it:

I’ll cut a new server release this upcoming week which will also let you auto-update the agents whenever new releases are done: