Below I’m elaborating a bit more my related tweet:
— George Birbilis (@Zoomicon) May 13, 2015
Showing below the easiest of the suggested solutions that I found in this page
At Chrome’s address bar you type:
and press the ENTER key on the keyboard
Then you should see a page Chrome generates to change some of its internal settings. When NPAPI is disabled the respective entry should appear in grey background like below.
Press Enable at the setting “Enable NPAPI Mac, Windows”
After enabling NPAPI the page should look like this (with the respective setting in white background):
After enabling the NPAPI option, close the Chrome webbrowser and reopen it.
You can then test if Silverlight is working by visiting for example
Btw, Chrome also is available as a Windows 8 app, in which mode it probably doesn’t support plugins at all, so if you’re running it on Windows 8 and see it always full screen inside a scrolling container, use the Chrome menu from the top-right of its window and select the option there to switch to the desktop version of Chrome instead (should say "Relaunch Chrome in desktop mode")