Examine source code of Numbers100

{
  "name": "Numbers",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "numbers.png"
    },
    "colors": {
      "frame": "rgba(82, 82, 82, 1)",
      "tab_background_text": "rgba(0, 255, 68, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1206eab1-a685-48ad-b271-ccd63ef8be7e}"
    }
  }
}