Examine source code of Automatic tab sorting

{
  "manifest_version": 3,
  "default_locale": "en",
  "name": "__MSG_ext_name__",
  "version": "2.4.8",
  "description": "__MSG_ext_description__",
  "author": "Gildas Le Drogoff",
  "homepage_url": "https://github.com/gildas-le-drogoff/active-tab-sorting-firefox",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "TabSort",
    "default_popup": "popup.html"
  },
  "sidebar_action": {
    "default_title": "__MSG_sidebar_title__",
    "default_panel": "sidebar/sidebar.html",
    "open_at_install": false
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "tabs",
    "tabGroups",
    "storage",
    "alarms",
    "sessions"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+Space"
      },
      "description": "__MSG_cmd_open_palette__"
    },
    "toggle-sidebar": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      },
      "description": "__MSG_cmd_open_sidebar__"
    },
    "extract-domain-group": {
      "suggested_key": {
        "default": "Alt+Shift+T"
      },
      "description": "__MSG_cmd_extract_group__"
    },
    "group-all": {
      "suggested_key": {
        "default": "Alt+Shift+G"
      },
      "description": "__MSG_cmd_group_all__"
    },
    "close-group": {
      "suggested_key": {
        "default": "Alt+Shift+C"
      },
      "description": "__MSG_cmd_close_group__"
    },
    "remove-duplicates": {
      "suggested_key": {
        "default": "Alt+Shift+R"
      },
      "description": "__MSG_cmd_remove_dup__"
    }
  },
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png",
    "256": "images/icon-256.png",
    "512": "images/icon-512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2788fd60-04b0-4a8f-8605-3562e3396216}",
      "strict_min_version": "139.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}