用 WizTree 对比了下
可能是：
UBO
内置规则以 txt 存储
UBOL
内置规则以 json 存储，格式稍微复杂点，同一条规则对比 txt 字符数更多，即使在规则数量上更少，但占用的硬盘空间却更大
还有所有 js 代码必须在本地扩展包内
In Manifest V3, all of your extension’s logic must be part of the extension package. You can no longer load and execute remotely hosted files according to Chrome Web Store policy. Examples include:
- JavaScript files pulled from the developer’s server.
- Any library hosted on a CDN.
- Bundled third-party libraries that dynamically fetch remote hosted code.