Relevant bugs for Firefox: implement performance.memory [0] Need something like performance.memory, need to figure out what [1] Please comment your use cases

Relevant bugs for Firefox: implement performance.memory [0] Need something like performance.memory, need to figure out what [1] Please comment your use cases in these bugs. [0] https://bugzilla.mozilla.org/show_bug.cgi?id=1124223 https://bugzilla.mozilla.org/show_bug.cgi?id=1124223 [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1132852 https://bugzilla.mozilla.org/show_bug.cgi?id=1132852