Examine source code of Emoji from Image

{
  "manifest_version": 2,
  "name": "Emoji from Image",
  "version": "1.0",
  "description": "Suggests an emoji similar to hovered small image (like avatar or icon).",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Emoji from Image"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ffcaf4f-4442-4df4-bdfc-3656c544efc2}"
    }
  }
}