We had enabled Pointer Events on the nightly builds for a while and resolved the major blockers to ship it. Although there are some bugs ongoing and some spec issues under discussion, we think they don't block the functionalities of Pointer Events and plan to ship it within the next few weeks.
Bug 822898 - Implement pointer events
Link to standard:
All desktop platforms
Hopefully, we can ride the trains of FF58.
Preference behind which this is implemented:
Do other browser engines implement this?
Edge and Chrome already ship it.
Security & Privacy Concerns:
Pointer events expose more attributes to users, which may be used for fingerprinting.
There are some spec issues under discussion, and we'll revise the implementation once the spec is updated. Regarding fingerprinting, we probably could hide some attributes when privacy.resistFingerprinting is turned on. Need further discussion and implement it.