Examine source code of Bookmark Sync

{
  "name": "Bookmark Sync",
  "description": "Sync Bookmarks with Bookmark Manager",
  "version": "1.0",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "office@edv-gb.at"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "scripting",
    "activeTab",
    "bookmarks",
    "webRequest",
    "tabs",
    "declarativeNetRequest",
    "declarativeNetRequestFeedback",
    "cookies"
  ],
  "host_permissions": [
    "http://localhost:9999/*",
    "http://localhost:9200/*",
    "https://edvgbbm.cs.easyname.systems.edv-gb.at/*",
    "file://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "file://*/*"
      ],
      "js": [
        "/js/axios.min.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "/js/axios.min.map"
      ],
      "matches": [
        "file://*/*"
      ]
    }
  ],
  "action": {
    "default_title": "Click to open panel",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "64": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "64": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "sidebar_action": {
    "default_panel": "popup.html",
    "open_at_install": false
  }
}