Examine source code of Klaxon Cloud

{
  "name": "Klaxon Cloud",
  "description": "Klaxon sends you alerts when webpages you're watching change.",
  "homepage_url": "https://www.documentcloud.org/add-ons/MuckRock/Klaxon/",
  "version": "1.0",
  "manifest_version": 3,
  "action": {
    "default_icon": "icon-128.png",
    "default_title": "Klaxon Cloud"
  },
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "scripting",
    "activeTab",
    "identity",
    "storage",
    "tabs"
  ],
  "optional_host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "fonts/*"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Klaxon Cloud",
    "default_icon": "icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "klaxon-cloud@muckrock.com",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "personallyIdentifyingInfo"
        ]
      }
    }
  },
  "host_permissions": [
    "https://accounts.muckrock.com/*",
    "https://api.www.documentcloud.org/*"
  ]
}