Examine source code of SmartTab Organizer

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.2.3",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "author": "EspritVorace",
  "homepage_url": "https://github.com/EspritVorace/smart-tab-organizer",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "smart-tab-organizer@espritvorace.github.io",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "tabGroups",
    "storage",
    "notifications",
    "<all_urls>"
  ],
  "commands": {
    "organize-all-tabs": {
      "suggested_key": {
        "default": "Alt+Shift+O"
      },
      "description": "__MSG_cmdOrganizeAllTabs__"
    },
    "save-current-window-session": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      },
      "description": "__MSG_cmdSaveSession__"
    },
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+P"
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "SmartTab Organizer",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": false,
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}