Examine source code of EdWard

{
  "name": "EdWard",
  "description": "EdWard Search & Cite (Beta)",
  "version": "0.2.4",
  "permissions": [
    "activeTab",
    "contextMenus",
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "scripts/content.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "EdWard",
    "default_icon": {
      "16": "images/edward_16x16.png",
      "32": "images/edward_32x32.png",
      "64": "images/edward_64x64.png",
      "128": "images/edward_128x128.png"
    }
  },
  "icons": {
    "16": "images/edward_16x16.png",
    "32": "images/edward_32x32.png",
    "64": "images/edward_64x64.png",
    "128": "images/edward_128x128.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{2290e56f-764c-448a-8ace-42865a554b2f}"
    }
  }
}