Examine source code of Up in Smoke

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#615d58",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Up in Smoke",
  "manifest_version": 2,
  "description": "Was just playing around, like the background, thought some weed leaves would look nice, so that's the story.....lol."
}