Список движков JavaScript

Attributes and properties allow you to control how HTML elements function and read data about their state. Although the terms are often used interchangeably, subtle differences between the two can lead to unexpected behavior and bugs.

So the best and cleanest way is probably to rely on chrome.extension.getURL("/") . It can start with "moz", "chrome" or "ms-browser". Unlikely to change in the near future.

The window.requestIdleCallback() method queues a function to be called during a browser's idle periods. This enables developers to perform background and low priority work on the main event loop, without impacting latency-critical events such as animation and input response.