Interesting to package this as a firefox plugin. But the filters are pretty basic. Most can be implemented using an open library:

http://evanw.github.io/webgl-filter/

https://inspirit.github.io/jsfeat/

Next step is definitely trying face detection in the pipeline. So you can do Snapchat style filter art ;)

But its super hard getting it to run in web media stream capture at even 30 fps!

WebCV: https://github.com/jamt9000/webcv