Examine source code of Image Search Options

{
  "applications": {
    "gecko": {
      "id": "{4a313247-8330-4a81-948e-b79936516f78}",
      "strict_min_version": "52.0"
    }
  },
  "background": {
    "scripts": [
      "imagesearchoptions.js"
    ]
  },
  "description": "Customizable Image Search right click context options",
  "manifest_version": 2,
  "name": "Image Search Options",
  "version": "3.0.12",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true,
    "browser_style": false
  },
  "icons": {
    "16": "icons/iso_16.png",
    "48": "icons/iso_48.png",
    "128": "icons/iso_128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "activeTab",
    "tabs",
    "<all_urls>"
  ]
}