Helped me find a bug in my extension when i tried to migrate from mv2 to mv3, contentSettings was causing the extension to become disabled following an update, this diff tool helped me find why the extension kept disabling on migration.

Didn't understand the purpose of the second frame. What does pink, what does green frame mean? Frames have no titles, no placeholders and no explanation for them in "Help" -- so, I didn't understand and just used one of them to validate my manifest.json. Warning message was correct, so the app technically works. UX I wished to be improved.

handy for extension dev 👍