Examine source code of Auto Reader View

{
  "manifest_version": 2,
  "name": "Auto Reader View",
  "version": "1.1",
  "description": "Automatically opens articles in Reader View.",
  "icons": {
    "32": "icons/ico.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "webNavigation",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "options/popup.html",
    "theme_icons": [
      {
        "light": "icons/ico_light.png",
        "dark": "icons/ico_dark.png",
        "size": 16
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "AutoReaderView@houbo.org"
    }
  }
}