Examine source code of Amharic Geez Type

{
  "manifest_version": 2,
  "name": "Amharic Geez Type",
  "version": "1.0",
  "description": "This is an extenssion that will let you write amharic in any text input element in the web.",
  "icons": {
    "48": "icons/icon_2.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "scripting"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "amharic.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "rafaelwolde2031@gmail.com"
    }
  },
  "browser_action": {
    "default_icon": "icons/icon_2.png",
    "default_title": "Type Geez Script",
    "default_popup": "popup/setting.html"
  }
}