TestExecute + Firefox has stopped working

We are running the batch job that contain 9-10 Testcomplete tests using TestExecute. We are using firefox. But the Firefox get hung sometimes and it prevent running further tests. We got the pop up Firefox has stopped working.Attached here is the screenhot. 

We are using the batch script as mentioned in the below link.

https://support.smartbear.com/testcomplete/docs/working-with/automating/command-line-and-exit-codes/exit-codes.html

Thank

NG