Examine source code of Workona Spaces & Tab Manager

{
  "manifest_version": 2,
  "name": "Tab Manager by Workona",
  "short_name": "Workona",
  "version": "3.1.34",
  "minimum_chrome_version": "89",
  "description": "The world’s best tab manager",
  "homepage_url": "https://workona.com",
  "icons": {
    "16": "images/icon_16.png",
    "32": "images/icon_32.png",
    "48": "images/icon_96.png",
    "96": "images/icon_96.png",
    "128": "images/icon_128.png",
    "256": "images/icon_256.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "32": "images/bookmark_btn.png"
    },
    "default_title": "Workona Spaces"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox-addon@workona.com"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+D",
        "windows": "Alt+T"
      },
      "description": "Save current tab to space"
    },
    "manager": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "Switch space"
    },
    "switch": {
      "suggested_key": {
        "default": "Alt+S"
      },
      "description": "Universal search"
    },
    "new": {
      "suggested_key": {
        "default": "Alt+N"
      },
      "description": "New space or doc"
    },
    "close": {
      "description": "Close space"
    },
    "search": {
      "description": "Find or create"
    }
  },
  "permissions": [
    "contextMenus",
    "history",
    "storage",
    "tabs",
    "tabHide",
    "unlimitedStorage"
  ],
  "optional_permissions": [
    "tabGroups"
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "https://workona.com/*",
        "https://*.workona.com/*"
      ],
      "js": [
        "messagePassing.js"
      ],
      "run_at": "document_start"
    }
  ]
}