Merlin
CSS Diff

CSS Diff

As you make CSS changes in the DevTools inspector window this will track your changes and provide you with a nicely formatted diff

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "CSS Diff",
  "version": "1.0",
  "author": "Evan Borgstrom",
  "description": "As you make CSS changes in the DevTools inspector window this will track your changes and provide you with a nicely formatted diff",
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "devtools_page": "devtools.html"
}