Mozilla Firefox Quantum V66.0.5 Official

Mozilla Firefox Quantum v66.0.5, released on May 7, 2019, was a critical point update primarily focused on resolving a significant bug that caused browser extensions to be disabled.

Automatically prevents websites from playing sound-enabled media. Mozilla Firefox Quantum v66.0.5

A new ability to search through all open tabs via the tab overflow menu. Mozilla Firefox Quantum v66

As part of the broader Firefox 66 release, this version includes: released on May 7

Allows users to authenticate on websites using facial recognition or fingerprints on Windows 10. System Requirements Firefox 66.0.5 System Requirements