Examine source code of Context Search Origin

{
  "manifest_version": 2,
  "name": "Context Search Origin",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "version": "2.8.2",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "menus",
    "tabs",
    "storage",
    "bookmarks"
  ],
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "all_frames": true,
      "js": [
        "query.js"
      ]
    }
  ],
  "icons": {
    "24": "icons/search.svg"
  },
  "applications": {
    "gecko": {
      "id": "{e040cf12-0537-4265-8ce0-ee195356ed60}",
      "strict_min_version": "64.0"
    }
  }
}