Examine source code of Omnindex

{
  "manifest_version": 2,
  "name": "Omnindex",
  "version": "1.1",
  "description": "Create your own search engine using your bookmarks",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "bookmarks",
    "storage",
    "*://*.omnindex.com/*"
  ],
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "Omnindex",
    "default_popup": "dist/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.omnindex.com/*"
      ],
      "js": [
        "dist/bridge.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@omnindex.com"
    }
  }
}