Examine source code of Tabs aside

{
  "manifest_version": 3,
  "name": "__MSG_manifest_name__",
  "description": "__MSG_manifest_description__",
  "version": "3.3.1",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png",
    "1024": "icon/1024.png"
  },
  "homepage_url": "https://github.com/xfox111/TabsAsideExtension/",
  "action": {
    "default_title": "Tabs aside",
    "default_popup": "popup.html"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "unlimitedStorage",
    "tabs",
    "notifications",
    "contextMenus",
    "tabGroups"
  ],
  "optional_permissions": [
    "bookmarks",
    "scripting"
  ],
  "commands": {
    "show_collections": {
      "suggested_key": {
        "default": "Alt+P",
        "mac": "MacCtrl+P"
      },
      "description": "__MSG_shortcuts_toggle_sidebar__"
    },
    "set_aside": {
      "suggested_key": {
        "default": "Alt+T",
        "mac": "MacCtrl+T"
      },
      "description": "__MSG_shortcuts_set_aside__"
    },
    "save": {
      "suggested_key": {
        "default": "Alt+U",
        "mac": "MacCtrl+U"
      },
      "description": "__MSG_shortcuts_save_tabs__"
    }
  },
  "optional_host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tabsaside@xfox111.net",
      "strict_min_version": "139.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "author": "__MSG_manifest_author__",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Tabs aside",
    "open_at_install": true
  }
}