D3 barchart on Firefox Android 4.4.2
There is no problem in Firefox. I have tested the said website on Firefox v35.0.2 and v40.0. It shows the graph as good as it does on Desktop.



If you are running the latest release yet facing that issue then it implies that your Firefox's configuration is messed up. I've NoScript addon installed and I allowed cloudflare.com and ocks.org in it, since both are needed to show that chart. 

I suggest you open Guest mode in the browser and visit that site. It should definitely help in understanding whether it's Firefox itself or your custom configuration that's causing the issue.