Examine source code of sweet4ever

{
  "theme": {
    "images": {
      "theme_frame": "sweet.jpg"
    },
    "colors": {
      "frame": "#de1d1d",
      "tab_background_text": "#140303"
    }
  },
  "version": "2.0",
  "name": "sweet4ever",
  "manifest_version": 2,
  "description": "puppy love - pink and frilly for Valentine's"
}