Examine source code of lordneu newtab-easy-bookmark

{
  "manifest_version": 3,
  "name": "lordneu-newtab-easy-bookmark",
  "version": "4.3",
  "description": "Quickly save pins to your lordn.eu dashboard.",
  "permissions": [
    "activeTab",
    "storage",
    "scripting",
    "theme",
    "geolocation"
  ],
  "host_permissions": [
    "*://lordn.eu/*",
    "*://www.lordn.eu/*",
    "http://localhost:3456/*",
    "*://*.pages.dev/*",
    "https://securetoken.googleapis.com/*"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "128": "icon.svg"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+B",
        "mac": "Command+Shift+B"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://lordn.eu/*",
        "*://www.lordn.eu/*",
        "http://localhost:3456/*",
        "*://*.pages.dev/*"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "background": {
    "scripts": [
      "extension-accent-theme.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pinsaver@lordn.eu",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ],
        "optional": [
          "locationInfo"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}