Right. Chrome uses a binary PDF reader plugin, there are no sources available. Open source projects like Chromium and Firefox require an open source reader. I think MuPDF would be a good choice.

Does MuPDF have any speed/performance/etc benefits over the plugin in Chrome? Are there any reasons to spend the time/effort to switched other then one is open source?

I wasn't talking about Chrome switching. MuPDF is an open source option for open source projects.