Examine source code of Savant Navigator

{
  "manifest_version": 2,
  "name": "Savant Navigator",
  "version": "1.1.0",
  "author": "Dan Grochmal",
  "description": "Navigate to a Baseball Savant player page from the address bar or by right clicking",
  "omnibox": {
    "keyword": "savant"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8129ddbe-8011-4522-bac2-994aca7b76c0}"
    }
  }
}