Examine source code of Swami

{
  "manifest_version": 2,
  "name": "Dictionary Extension",
  "version": "1.0",
  "description": "A simple extension that provides dictionary meanings of words on a web page.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "http://*/",
    "https://*/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8165cb29-3787-4b27-a8a4-282fe11a1d2e}"
    }
  }
}