Most add-ons load code and resources at the same time Firefox is starting up. In most cases the impact in start-up time is minimal, but some add-ons can cause a noticeable slowdown.
大多数附加组件在 Firefox 启动的同时加载代码和资源。大多数情况下这对启动时间的影响很小，但有些附加组件可能导致明显的变慢。