Examine source code of Some Hotkeys

{
  "manifest_version": 3,
  "name": "Some Hotkeys",
  "version": "1.2.1",
  "permissions": [
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "commands": {
    "scroll_down": {
      "suggested_key": {
        "default": "Alt+J"
      },
      "description": "Scroll down"
    },
    "scroll_up": {
      "suggested_key": {
        "default": "Alt+K"
      },
      "description": "Scroll up"
    },
    "swap_translation": {
      "suggested_key": {
        "default": "Alt+L"
      },
      "description": "Swap translation"
    },
    "tab_1": {
      "suggested_key": {
        "default": "Ctrl+1"
      },
      "description": "Switch to tab 1"
    },
    "tab_2": {
      "suggested_key": {
        "default": "Ctrl+2"
      },
      "description": "Switch to tab 2"
    },
    "tab_3": {
      "suggested_key": {
        "default": "Ctrl+3"
      },
      "description": "Switch to tab 3"
    },
    "tab_4": {
      "suggested_key": {
        "default": "Ctrl+4"
      },
      "description": "Switch to tab 4"
    },
    "tab_5": {
      "suggested_key": {
        "default": "Ctrl+5"
      },
      "description": "Switch to tab 5"
    },
    "tab_6": {
      "suggested_key": {
        "default": "Ctrl+6"
      },
      "description": "Switch to tab 6"
    },
    "tab_7": {
      "suggested_key": {
        "default": "Ctrl+7"
      },
      "description": "Switch to tab 7"
    },
    "tab_8": {
      "suggested_key": {
        "default": "Ctrl+8"
      },
      "description": "Switch to tab 8"
    },
    "tab_9": {
      "suggested_key": {
        "default": "Ctrl+9"
      },
      "description": "Switch to last tab"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "some_hotkeys@local.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}