Investigation revealed that Google has decided to obsolete the old Netscape Plugin Application Interface (NPAPI) technology, which Silverlight relies on. Suspecting a browser issue I fired up Internet Explorer where Active Trader Pro ran correctly. I was pretty sure Silverlight was installed on my system, but I dutifully reinstalled it-and was informed that it was already installed. In early April I attempted to logon to Fidelity’s Active Trader Pro using my Chrome browser and I was greeted with:

I have done that and it seems to be working well, but unfortunately this is not a solution for people not using Windows based computers. Fidelity recommends switching to their client based version of Active Trader Pro. Many other browsers still support NPAPI, but they (except for Microsoft) will probably follow Google’s lead and drop NPAPI support eventually. This breaks software packages like Microsoft’s Silverlight, which in turns breaks applications like Fidelity’s web based version of Active Trader Pro. In early September, 2015 Google stopped supporting NPAPI technology on Chrome.

Silverlight not working in chrome