Examine source code of Move Tab Hotkeys

{
  "name": "Move Tab Hotkeys",
  "description": "Hotkeys to move tabs around",
  "homepage_url": "https://github.com/jmmerz/move-tab-hotkeys",
  "manifest_version": 3,
  "version": "2.3.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "move_tabs_hotkeys@jmmerz.github",
      "strict_min_version": "109.0"
    }
  },
  "author": "Jonathon Merz",
  "icons": {
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "common/browserCompatibility.js",
      "common/globalOptions.js",
      "moveTabs.js"
    ]
  },
  "commands": {
    "move-tab-prev": {
      "suggested_key": {
        "default": "Alt+Shift+Left"
      },
      "description": "Move tab(s) backward"
    },
    "move-tab-next": {
      "suggested_key": {
        "default": "Alt+Shift+Right"
      },
      "description": "Move tab(s) forward"
    },
    "move-tab-first-numbers-row": {
      "suggested_key": {
        "default": "Alt+Shift+0"
      },
      "description": "Move tab(s) to the start"
    },
    "move-tab-first-numpad-numlock-on": {
      "suggested_key": {
        "default": "Alt+Insert"
      },
      "description": "Move tab(s) to the start (Example: Alt+Insert for Numeric Keypad 0 with NumLock On)"
    },
    "move-tab-first-numpad-numlock-off": {
      "suggested_key": {
        "default": "Alt+Shift+Insert"
      },
      "description": "Move tab(s) to the start (Example: Alt+Shift+Insert for Numeric Keypad 0 with NumLock Off)"
    },
    "move-tab-last-numbers-row": {
      "suggested_key": {
        "default": "Alt+Shift+9"
      },
      "description": "Move tab(s) to the end"
    },
    "move-tab-last-numpad-numlock-on": {
      "suggested_key": {
        "default": "Alt+PageUp"
      },
      "description": "Move tab(s) to the end (Example: Alt+PageUp for Numeric Keypad 9 with NumLock On)"
    },
    "move-tab-last-numpad-numlock-off": {
      "suggested_key": {
        "default": "Alt+Shift+PageUp"
      },
      "description": "Move tab(s) to the end (Example: Alt+Shift+PageUp for Numeric Keypad with NumLock Off)"
    }
  },
  "options_ui": {
    "page": "options/options.html"
  }
}