Examine source code of HTTPS Request Capture

{
  "manifest_version": 2,
  "name": "HTTPS Request Capture",
  "version": "1.0",
  "description": "Capture and display HTTPS requests in Firefox",
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "https-request-capture@example.com",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "HTTPS Request Capture",
    "default_popup": "popup.html"
  }
}