In the past, many plugins were developed using an old system called NPAPI . Today, only a handful of websites are using the NPAPI plugin, because these plugins sometimes pose a security risk to the site.
To get users to a safer, faster, and more stable chrome browsing experience, the NPAPI plugin is now closed for Chrome version 42.
Plug-ins for newer, more secure systems using the Pepper API (PPAPI) will continue to work normally, including those included with Chrome, such as Adobe Flash and PDF viewers. However, some plugins that use NPAPI (including Silverlight, Java, and unity) will not be available.
Although the Npapi plugin can be temporarily enabled by entering chrome://flags/#enable-npapi in the Address bar, this option will be removed after Chrome45 is released, and the Npapi plug-in will officially be completely disabled. If you really need to use it, you can only browse it with a different browser.
After that, Silverlight,java and unity will not support running on the Chrome browser, and because of the high market share of chrome, there will be a lot of users lost if the plugin is not improved.
Of course, Silverlight has been abandoned by Microsoft, the official website closed, a few years has not been updated, has long faded from public view. Java because of the release of javafx2.x , a little still struggling, but because Java currently has to trust the applet program must be signed , so that ordinary users posted to the online program will be banned by the Java plug-in, for Java The Web publishing of applets is a relatively big blow and the outlook is not optimistic.
But unity is forbidden or is a pity, because these years is Unity3d speed development period, hand travel constantly, page tour also began slowly occupy the market, these also need to see the subsequent update, of course, Unity 5 can be released into WebGL, more or less have another choice.
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Chrome disables NPAPI plugins (including Silverlight, Java, and Unity)