I had a little more time to work on this recently. Mostly doing some UI stuff so it is starting to look a lot like a browser.
Adding NPAPI support is actually easier than I thought - you just create a plugin instance, give it a window to draw into and feed it data, it will take care of itself. I'll do that so you can use any plugins including Flash. Installing and enabling them on the pages you trust is your responsibility. I give you freedom. Fuckings to the authoritarian "security" dipshits who are ruining the Internet.