Examine source code of ANSI Display Advanced

{
  "manifest_version": 2,
  "version": "4.0.0",
  "name": "__MSG_extensionName__",
  "description": "__MSG_description__",
  "author": "eight",
  "permissions": [
    "contextMenus",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "*://*/*.ans",
    "*://*/*.ansi",
    "*://*/*.bbs",
    "file:///*"
  ],
  "background": {
    "scripts": []
  },
  "content_scripts": [
    {
      "matches": [
        "file:///*"
      ],
      "include_globs": [
        "*.ans",
        "*.bbs",
        "*.ansi"
      ],
      "js": [],
      "css": []
    }
  ],
  "commands": {
    "viewAsANSI": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "View current page as ANSI"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e133688b-86bf-4e3a-9fa2-2b91e97e0a58}"
    }
  }
}