Examine source code of Save to Notion

{
  "manifest_version": 2,
  "name": "Save to Notion",
  "version": "4.0.19",
  "description": "Save the Web to Notion (Firefox)",
  "permissions": [
    "activeTab",
    "storage",
    "cookies",
    "contextMenus",
    "unlimitedStorage",
    "https://*.notion.so/*",
    "<all_urls>"
  ],
  "optional_permissions": [
    "tabs",
    "<all_urls>",
    "https://*.licdn.com/*"
  ],
  "commands": {
    "add-highlights": {
      "suggested_key": {
        "default": "Ctrl+Shift+E",
        "mac": "Command+Shift+E"
      },
      "description": "Add highlights to your Notion Page"
    },
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+E",
        "mac": "Alt+Shift+E"
      }
    }
  },
  "icons": {
    "48": "./assets/icon48.png",
    "128": "./assets/icon128.png"
  },
  "web_accessible_resources": [
    "popup/index.html",
    "modal/modal.html",
    "toast/toast.html",
    "highlightTooltip/highlightTooltip.html",
    "restricted_popup/index.html",
    "restricted_popup/script.js",
    "onboarding_guide_popup/index.html",
    "onboarding_guide_popup/script.js",
    "assets/*.js"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'; connect-src *",
  "content_scripts": [],
  "browser_action": {
    "default_title": "Save to Notion"
  },
  "background": {
    "scripts": [
      "serviceWorker.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd40e25c-7e66-4602-b8ef-35b979b78cbb}"
    }
  }
}