Rich text editing in Scratch. I had saved the ScratchFormat source code on to a thumbdrive, since I was building a new computer, but somehow the files got corrupted, so I'm gonna try to re-write it in a cleaner, more efficent manner.
Chrome: https://chrome.google.com/webstore/detail/scratchformat/fklhbhcbpnkiifblkhoioddoadlknecl
Firefox: https://addons.mozilla.org/en-US/firefox/addon/scratchformat/