Karma cannot start Firefox with Jenkins and Ubuntu 12.04

Question

I have set up a Jenkins job that should run Firefox. Signed in to Ubuntu with the Jenkins user, I can manually launch Firefox without any problem. However, when I run the job in

Answer 1

Would you mind running karma with --log-level debug and also --no-colors so we can have a better idea of the reason why it fails?

I you also tried with another browser? I often encounter issues while running a GUI tool within Jenkins.

You might want to try running your test suite with PhantomJS (http://phantomjs.org/) just to see if a headless browser would solve the problem