Examine source code of its kill or be killed

{
  "theme": {
    "images": {
      "theme_frame": "travistool.png"
    },
    "colors": {
      "frame": "#ab2929",
      "tab_background_text": "#c22d2d"
    }
  },
  "version": "2.0",
  "name": "its kill or be killed",
  "manifest_version": 2,
  "description": "There is no more heroes!"
}