Selenium not working on server as it works on local machine
This sounds like an issue with your OS or Browser configuration. The first thing you should do is screenshot the results in your framebuffer and make sure that firefox is loading JS content properly. If it is not then you may need to check your browser/OS configurations.
pyvirtualdisplay has a way of screenshot that you can look at here
specflow can also screenshot, instructions here
If it is a FireFox/Browser issue, be sure that you have installed all the proper plugins and Java needed to run javascript on your server. Make sure that javascript is enabled for that browser.