Examine source code of Tab Board

{
  "version": "1.1.3",
  "name": "Tab Board",
  "description": "Save, organize, and reopen browser tabs in groups with optional GitHub Gist sync.",
  "icons": {
    "32": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "background/scripts.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content_scripts/content-0.js"
      ],
      "run_at": "document_idle",
      "css": []
    }
  ],
  "action": {
    "default_popup": "action/index.html"
  },
  "commands": {
    "open-popup": {
      "suggested_key": {
        "default": "Ctrl+Shift+D",
        "mac": "Command+Shift+D"
      },
      "description": "Open popup"
    },
    "open-command-palette": {
      "suggested_key": {
        "default": "Ctrl+K",
        "mac": "Command+K"
      },
      "description": "Open command palette"
    }
  },
  "options_page": "options/index.html",
  "permissions": [
    "tabs",
    "storage",
    "bookmarks",
    "contextMenus"
  ],
  "host_permissions": [
    "https://api.github.com/*"
  ],
  "author": "Pham Huu Loc",
  "browser_specific_settings": {
    "gecko": {
      "id": "tabboard@phamhuulocforwork.github.io",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "manifest_version": 3,
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*.css",
        "assets/CHANGE_LOGS.21b4eb9d.md",
        "assets/black-button.6a71dfd1.png",
        "assets/square-button.08550d59.png",
        "assets/white-button.87f2b9b0.png",
        "pages/command-palette.html"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ]
}