Examine source code of Search Modifier

{
  "manifest_version": 2,
  "name": "Search Modifier",
  "version": "1.2",
  "description": "Automatically appends '-ai' to search queries and lets you manage search engines.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icon.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Search Modifier"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f7df357-d170-4393-a5e1-ec6730c33ac0}"
    }
  }
}