Examine source code of Cookie Manager

{
  "manifest_version": 2,
  "name": "Cookie Manager Pro",
  "version": "3.0.0",
  "description": "The ultimate cookie manager: monitor, protect, clean, export/import, profiles, rules, containers, dashboard & more. 100% offline.",
  "author": "0XLUC4",
  "homepage_url": "https://github.com/0XLUC4/cookie_manager",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "cookies",
    "storage",
    "contextualIdentities",
    "clipboardWrite",
    "tabs",
    "<all_urls>"
  ],
  "commands": {
    "quick-export": {
      "suggested_key": {
        "default": "Ctrl+Shift+E"
      },
      "description": "Quick export cookies"
    },
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+I"
      },
      "description": "Open Cookie Manager"
    }
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Open Cookie Manager"
  },
  "sidebar_action": {
    "default_title": "Cookie Manager Pro",
    "default_panel": "sidebar/sidebar.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "open_at_install": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cookie-manager@extension.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}