While many extensions have been removed from official stores, several high-performance tools remain dominant for Chrome, Firefox, and Edge users:
It detects almost any video playing on a page and offers various quality options (720p, 1080p, etc.).
Ultimately, you must weigh the convenience of a simple browser extension against the very real potential for harm. In most cases, the safest choice is to look beyond the browser and invest in a tool designed for the long haul.