Examine source code of Pocket - Read Later

{
  "manifest_version": 3,
  "name": "Pocket - Read Later",
  "browser_specific_settings": {
    "gecko": {
      "id": "stash-read-later@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "version": "1.7.6",
  "description": "Save articles, videos and pages to read later. Featuring a clean dashboard, tags, search, archive and a built-in reader view.",
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "assets/icon16.png",
      "32": "assets/icon32.png",
      "48": "assets/icon48.png"
    },
    "default_popup": "popup/popup.html",
    "default_title": "Save to Pocket"
  },
  "options_ui": {
    "page": "dashboard/dashboard.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "reader/reader.html",
        "dashboard/dashboard.html",
        "assets/*",
        "library/library.html",
        "library/library.js",
        "library/library.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}