I have been searching for something like this for years! Wish it wasn't Firefox-only :( What would it take to get it ported to a better browser?
Here's my crack at coloring or syntax-highlighting the parts of english speech for easier analysis, but mine was a manual process: https://github.com/tomhodgins/bil
Here's my crack at coloring or syntax-highlighting the parts of english speech for easier analysis, but mine was a manual process: https://github.com/tomhodgins/bil