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Starting in January 2014, Chrome will block webpage-instantiated NPAPI plug-ins by default on the Stable channel. To avoid disruption to users, we will temporarily whitelist the most popular NPAPI plug-ins that are not already blocked for security reasons. These are:
Silverlight (launched by 15% of Chrome users last month) Unity (9.1%) Google Earth (9.1%) Java (8.9%) * Google Talk (8.7%) Facebook Video (6.0%)
* Already blocked by default for security reasons.
In the short term, end users and enterprise administrators will be able to whitelist specific plug-ins. Eventually, however, NPAPI support will be completely removed from Chrome. We expect this to happen before the end of 2014, but the exact timing will depend on usage and user feedback. Note that the built-in Flash plug-in and PDF viewer will be unaffected because they don’t use NPAPI.
Google Says It Will Block Plug-Ins In Chrome From January 2014 [blog.chromium.org]