Examine source code of OliveBats

{
  "theme": {
    "images": {
      "theme_frame": "batfirefoxheader.png"
    },
    "colors": {
      "frame": "#fffb00",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "OliveBats",
  "manifest_version": 2,
  "description": "A repetitive pattern of bats on a cute olive-y background! :D"
}