Chromium Blog
News and developments from the open source browser project
NPAPI plug-ins in Windows 8 Metro mode
Friday, July 20, 2012
We recently announced initial support for
Chrome in Windows 8 Metro mode
. One thing that early testers may have noticed is that some existing plug-ins don't work. These plug-ins are built using a technology called
NPAPI
, which,
like ActiveX
, is not compatible with Windows 8 Metro mode.
Note that because
Adobe Flash Player
and Chrome’s
PDF viewer
have both been bundled as Pepper plug-ins running in a sandboxed environment in Chrome, these two widely-used plug-ins will continue to work in Windows 8 Metro mode on all websites.
We’ve noticed that other than Flash and PDF, usage of plug-ins has been steadily decreasing over the past few years, to the point where a relatively small percentage of our users load any of these plug-ins at all. The following table shows some well-known plug-ins along with the percentage of active Chrome users who instantiated that plug-in during a 28-day window:
Plug-in name
Percentage
Flash Player
99.9%
Chrome PDF Viewer
58%
Silverlight
26%
Java
12%
QuickTime
4%
Windows Media Player
2%
This data came from more than 20 million Chrome users who have opted in to share non-identifying
usage statistics
with Google, which are aggregated to understand how Chrome features are used.
We expect NPAPI plug-in usage to continue declining over time, especially since plug-ins can’t run on most phones and tablets. If the trends continue, we look forward to the day when NPAPI can retire peacefully to the countryside.
Posted by Carlos Pizano, Software Engineer and Metro Gnome
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