Automatically prevents websites from playing sound-enabled media.
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. Mozilla Firefox Quantum v66.0.5
The primary fix in v66.0.5 addressed a remaining issue where web extensions were still disabled for users with a master password set. released on May 7