: Identifies the primary brand and major version.
The most "interesting" part of this header is the Not=A?Brand segment, which is a deliberate feature of the . : Identifies the primary brand and major version
: This header is part of a broader move by Google and Microsoft to phase out the standard User-Agent string, which contains too much information that can be used for "fingerprinting" (tracking users without cookies). Breakdown of Your Specific String: : Identifies the primary brand and major version