WIN 10 64 BIT 2.8GHz Quadcore 32GB RAM ASP.NET MVC 4.5 Application w/WebAPI (Rest Endpoints) I'm using a jQuery ajax call to dynamically load a partial page into a modal and FF freeze upon rendering my textbox and dropdown elements. Attached is a video that show the responsiveness issue. I've tested this in IE 11, MS Edge, Chrome and FF is the only browser that has this issue. I have a video file to show that I couldn't upload. Let me know how to get this to you. Also I couldn't event opening the Dev Tools to troubleshoot revealed nothing. The browser just frosted over.