Font awesome not displaying properly on Firefox

Question

I am trying to use a font awesome icon in a widget that is installed on a customers website. The font awesome icons displays correctly in Safari and Chrome but doesnt in Firefo

Answer 1

Firefox blocks Cross-Origin Request.

Firefox disallows reading the remote resource due to Same Origin Policy for below CDN:

https://maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css

I dug little to fix CORS issue instead I replaced above CDN with below one and icons rendering fine: