If you cannot download JSC from Google Chrome, follow the instructions below…
STEP1: In your URL bar, enter: “chrome://flags/#enable-npapi” without the quotation marks
STEP2: Click the Enable link for the “Enable NP API” configuration option.
STEP3: Click the Relaunch button that now appears at the bottom of the configuration page.
Why do you have to do this?
see the following URL for more info…