If you have a legacy Silverlight app you must run:
The decision was controversial at the time but widely praised in retrospect. NPAPI plugins had direct access to system memory and processes, leading to: silverlight chrome plugin
High-definition video playback (used by Netflix and NBC). If you have a legacy Silverlight app you
From that point forward, there was no "Silverlight Chrome plugin" to download. Microsoft never rewrote Silverlight for Chrome’s newer or for modern browser extensions. silverlight chrome plugin