Examine source code of Context Re-Link

{
  "manifest_version": 2,
  "name": "Context Re-Link",
  "version": "1.0",
  "description": "Re-Link to alternative sites for a better experience.",
  "permissions": [
    "contextMenus",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{430f4156-3f27-453b-841d-67ef2d4488e6}"
    }
  }
}