Examine source code of JavaScript Switch

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "2.0.18",
  "default_locale": "en",
  "icons": {
    "16": "./icons/icon-show-16.png",
    "24": "./icons/icon-show-24.png",
    "32": "./icons/icon-show-32.png",
    "48": "./icons/icon-show-48.png",
    "64": "./icons/icon-show-64.png",
    "128": "./icons/icon-show-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "popup/messages.js"
  ],
  "page_action": {
    "default_icon": "icons/icon-show-24.png",
    "default_title": "JavaScript Switch",
    "browser_style": true
  },
  "browser_action": {
    "default_icon": "icons/icon-show-24.png",
    "default_title": "JavaScript Switch",
    "browser_style": true
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "activeTab",
    "tabs"
  ]
}