Examine source code of LoopIt - A-B Video Looper

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "short_name": "LoopIt",
  "version": "1.10.0",
  "description": "__MSG_extensionDescription__",
  "author": "POLPROG",
  "homepage_url": "https://polprog.pl/",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ],
      "css": [
        "content-style.css"
      ]
    }
  ],
  "permissions": [
    "storage",
    "menus"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "LoopIt – Toggle Video Loop Panel",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      },
      "description": "Toggle LoopIt panel"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3b07384-d9a0-4c9b-8b3e-4a7f2c1e9b5a}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "default_locale": "en"
}