Examine source code of Custom Scrollbars

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "4.5.1",
  "description": "__MSG_extensionDescription__",
  "author": "Wesley Branton",
  "default_locale": "en",
  "developer": {
    "name": "Wesley Branton",
    "url": "http://addons.wesleybranton.com"
  },
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "__MSG_extensionName__",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/scrollbars.html",
    "browser_style": false,
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "customscrollbars@computerwhiz",
      "strict_min_version": "64.0"
    }
  },
  "background": {
    "scripts": [
      "defaults.js",
      "generateCSS.js",
      "crossbrowser.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://addons.wesleybranton.com/addon/custom-scrollbars/*",
        "*://customscrollbars.com/*"
      ],
      "js": [
        "crossbrowser.js",
        "webservice/unsubscribeFromNotifications.js",
        "webservice/openOptions.js"
      ],
      "all_frames": false,
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage",
    "<all_urls>"
  ],
  "optional_permissions": [
    "downloads"
  ]
}