Moz JPEG is promoted by Mozilla as an alternative to the Google's Web P format.
Most often, cable modems and DSL devices do not fall into this category.
The goal is to ensure fairness so that each flow is able to send data in turn, thus preventing any single flow from drowning out the rest.
This may in fact have some effect in mitigating a Denial of Service attempt.
SFQ is work-conserving and therefore always delivers a packet if it has one available. SFQ knows about ipv4 and ipv6 and also UDP, TCP and ESP.
Packets with other protocols are hashed based on the 32bits representation of their destination and the socket they belong to. Each of these buckets should represent a unique flow.