It is based on a regular release of Firefox for desktop and is intended for use by several kinds of organizations like schools, businesses, and all those who need extended support for mass deployments or who want to set up and maintain Firefox on a large scale. Using Firefox ESR, IT professionals can easily configure and deploy Firefox in their organization. Its UI is snappier! What is Firefox ESR?įirefox ESR or Extended Support Release is a version of the browser designed for IT professionals in particular.It takes up lesser system resources than Chrome.The dev tools of Firefox Quantum are slightly better than Chrome’s.It gives users more control over how their data is handled.Firefox Quantum is much faster than its predecessor and also Chrome and Edge.And rightfully so because of the following reasons: When it was launched it created a lot of market hype and many people have even switched their browsers since. It includes several improvements to Firefox’s Gecko browser engine and also includes refinements to the UI and interactions. Firefox’s latest version, Firefox Quantum is claimed to be the fastest version of the browser ever.