Examine source code of Open in Google Maps

{
  "manifest_version": 2,
  "name": "Open in Google Maps",
  "version": "1.0.0",
  "author": "tupolev",
  "description": "Search selected text in Google Maps with a right-click context menu.",
  "default_locale": "en",
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Open in Google Maps"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e2ed68fa-cbe9-4e69-9117-bd115a58ffe5}"
    }
  }
}