Firefox Quantum

In plain words

Firefox Quantum is the newest version of the Firefox web browser, designed to be faster than previous iterations. It is for anyone seeking a high-performance web browser alternative. The browser became available in beta in September 2017, with the full launch scheduled for November 14, 2017. Firefox Quantum stands out for its emphasis on speed improvements and is available across multiple platforms.

written from the facts on this page · September 2026

From the sources

Firefox Quantum is the newest, fastest version of Firefox yet. Launches November 14, 2017. Available in beta now for all.

Firefox Quantum was a revolution. In 2017, we created a new, lightning fast browser that constantly improves. Firefox Quantum is the Firefox Browser.

Firefox Quantum was a revolution in Firefox development. In 2017, we created a new, lightning fast browser that constantly improves. Firefox Quantum is the Firefox Browser. Please download Firefox ESR (Extended Support Release) to use Firefox. Please download Firefox ESR (Extended Support Release) to use Firefox. Get speed and security. Firefox is fast because we don’t track yourfrom mozilla.org

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