Hi Sarenji! I made a few edits to your diff app. Link here. I made it into efficiency cleanup instead of semantic clean up because the diff app tends to get wonky for long / many edits. I also added the timeout option so that it works better for longer diffs and a colour chooser. (I like blue~~~) Will probably make it looks nicer / try to give it some optimization if possible. Setting timeout to 0 crashed my firefox once :< Anyway, may I ask for your permission to bump your thread? :) Suggestions welcome too~ :D Thanks!!