Examine source code of Pull Tabs

{
  "manifest_version": 3,
  "name": "Pull Tabs",
  "description": "Save the current window's open tabs to disk, bookmark them, copy them to the clipboard, or close them.",
  "icons": {
    "16": "img/icon-16.png",
    "32": "img/icon-32.png",
    "48": "img/icon-48.png",
    "128": "img/icon-128.png"
  },
  "optional_host_permissions": [
    "https://api.raindrop.io/*",
    "https://www.instapaper.com/*",
    "https://readwise.io/*"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "permissions": [
    "tabs",
    "downloads",
    "bookmarks",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5110d56d-5344-43e2-9db0-01edc142bcd1}",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  },
  "action": {
    "default_icon": "img/icon.svg",
    "default_popup": "popup.html",
    "default_title": "Pull Tabs"
  },
  "background": {
    "scripts": [
      "background-page.js"
    ]
  },
  "version": "0.30.1"
}