Examine source code of Waterfox Unofficial Theme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#bcb2ff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Waterfox Unofficial Theme",
  "manifest_version": 2,
  "description": "I noticed a definite lack of themes related to Waterfox, the 64-bit port of Firefox, so I (rather lazily) chipped in with this one. I would've done more, but I couldn't find the Waterfox logo in a higher resolution than 500x500."
}