Examine source code of SessionPaw: Tabs Outliner

{
  "icons": {
    "16": "icon16.plasmo.2577fc03.png",
    "32": "icon32.plasmo.d583dc1e.png",
    "48": "icon48.plasmo.e0fcfb1d.png",
    "64": "icon64.plasmo.e6259081.png",
    "128": "icon128.plasmo.96a1ede9.png"
  },
  "manifest_version": 3,
  "action": {
    "default_icon": {
      "16": "icon16.plasmo.2577fc03.png",
      "32": "icon32.plasmo.d583dc1e.png",
      "48": "icon48.plasmo.e0fcfb1d.png",
      "64": "icon64.plasmo.e6259081.png",
      "128": "icon128.plasmo.96a1ede9.png"
    },
    "default_popup": "popup.html"
  },
  "version": "5.1.2659",
  "author": "SessionPaw Builders",
  "name": "Session Paw: SideWise OneTab Tabs Outliner",
  "description": "Tree Style Tabs Outliner & Quick Jump to Recent Tabs & Group Tab and Windows & Tab Session Manager.",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "system.display",
    "favicon",
    "tabGroups",
    "sidePanel",
    "activeTab",
    "tabs",
    "bookmarks",
    "unlimitedStorage",
    "sessions",
    "contextMenus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sessionpaw@gmail.com"
    }
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets",
        "icons",
        "_favicon/*"
      ],
      "extension_ids": [
        "*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "windows": "Ctrl+E",
        "mac": "Command+E",
        "chromeos": "Ctrl+E",
        "linux": "Ctrl+E"
      }
    }
  },
  "default_locale": "en"
}