Just released a major update to the plugin to address our scaling issues!!
The gist is that the plugin now requires users to sign up for a face.com API key and then it uses JS+HTML5 canvas to hit that service directly and edit the images on each page in place. It should use significantly less bandwidth than it did previously.
You can update the plugin by going to
chrome://extensions and clicking to update all plugins.
And if you haven't installed yet, I suggest you try it out:
https://chrome.google.com/webstore/detail/gnmngbknombiopoggilgiebonllnndhp
(Note: to keep things simple, this release doesn't attempt to rotate or angle mustaches the same way the original mustachio service does. Expect that in a later update)