Examine source code of Tabsets - better Bookmarks

{
  "manifest_version": 3,
  "icons": {
    "16": "icons/icon-16x16.png",
    "48": "icons/icon-48x48.png",
    "128": "icons/icon-128x128.png"
  },
  "host_permissions": [
    "<all_urls>",
    "*://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>",
        "*://*/*"
      ],
      "js": [
        "tabsets-content-script.js"
      ]
    },
    {
      "matches": [
        "*://rapidapi.com/*"
      ],
      "js": [
        "tabsets-request-interceptor-inject.js",
        "tabsets-request-interceptor.js"
      ]
    },
    {
      "matches": [
        "*://*/disabled---*"
      ],
      "js": [
        "tabsets-toolbar-contentscript.js"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "*"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "omnibox": {
    "keyword": "ts"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+B",
        "mac": "Command+B"
      }
    },
    "search": {
      "description": "Open Search Box"
    },
    "tabHistoryBack": {
      "description": "Open last open tab"
    },
    "tabHistoryForward": {
      "description": "Forward to next tab (if available)"
    },
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Period"
      }
    }
  },
  "options_page": "www/index.html#/mainpanel/settings",
  "browser_specific_settings": {
    "gecko": {
      "id": "{5809ba95-274e-4fd3-a92d-5baf03026290}"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "alarms",
    "scripting",
    "contextMenus",
    "webRequest",
    "bookmarks"
  ],
  "optional_permissions": [
    "notifications"
  ],
  "optional_host_permissions": [
    "<all_urls>",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_icon": "icons/icon-48x48.png",
    "default_title": "Tabsets",
    "default_panel": "www/index.html#/sidepanel",
    "open_at_install": true
  },
  "name": "Tabsets.net",
  "short_name": "Tabsets.net",
  "description": "Use tabsets.net to safely keep track of all your tabs and links in the Side Panel, stored locally on your browser",
  "version": "0.7.6",
  "action": {
    "default_title": "Tabsets.net"
  }
}