Examine source code of hwmmts

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#381010",
      "tab_background_text": "#d64949"
    }
  },
  "version": "2.0",
  "name": "hwmmts",
  "manifest_version": 2,
  "description": "This is the most precious time to spend the days with the one you love most in your life. That's why she is my theme on my fav Mozilla firefox."
}