Examine source code of OpenGraphs

{
  "name": "OpenGraphs",
  "description": "Test and view the open graph data and images for your site.",
  "version": "0.0.2",
  "manifest_version": 2,
  "browser_action": {
    "default_title": "OpenGraphs",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "sw.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0620a18-8727-446d-9abd-765bf09f15b3}"
    }
  },
  "icons": {
    "16": "icons/opengraphs-icon-16.png",
    "32": "icons/opengraphs-icon-32.png",
    "48": "icons/opengraphs-icon-48.png",
    "64": "icons/opengraphs-icon-64.png",
    "128": "icons/opengraphs-icon-128.png",
    "256": "icons/opengraphs-icon-256.png",
    "512": "icons/opengraphs-icon-512.png"
  },
  "permissions": [
    "contextMenus",
    "tabs",
    "webNavigation"
  ]
}