Examine source code of Broadsheet

{
  "manifest_version": 3,
  "name": "Broadsheet",
  "version": "0.1.0",
  "description": "Save the current tab to your Broadsheet read-it-later library.",
  "homepage_url": "https://broadsheet.marginalutility.dev",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Save to Broadsheet",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "notifications"
  ],
  "host_permissions": [
    "https://broadsheet.marginalutility.dev/*"
  ],
  "optional_host_permissions": [
    "http://localhost/*",
    "http://127.0.0.1/*",
    "https://*/*"
  ],
  "commands": {
    "save-current-tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+Shift+S"
      },
      "description": "Save current tab to Broadsheet"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "broadsheet@marginalutility.dev",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      }
    }
  }
}