Examine source code of Email Organizer

{
  "manifest_version": 2,
  "name": "Email Organizer",
  "version": "1.0",
  "description": "Automatically organizes emails by subject.",
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon.png"
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fd861db8-5a51-4884-8e7f-7666244607b6}"
    }
  }
}