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I have installed this extension

And now I am able to view .ppt and .doc files in my browser. I am perplexed. How does this work? It doesn't seem to be converting the files on a remote server. It seems to actually processing them on my PC!

Please explain

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up vote 2 down vote accepted

Is used Google's Native Client (which provides a sandboxed environment for native code extensions). It's very similar to Chrome's built-in PDF support.

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It embeds the QuickOffice application and turns it into a web based extension. This can be seen in the .cfx (Chrome extension) archive which includes the QuickOffice binaries such as platform_specific/x86_64/word_x86_64.nexe

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