===== Metrics =====
'''after tabs opened''' is one of several data points gathered, it is the most relevant to this project:
* [https://treeherder.mozilla.org/perf.html#/graphs?timerange=31536000&series=mozilla-central,1651963,1,4 Resident Memory - Linux] [https://treeherder.mozilla.org/perf.html#/graphs?timerange=31536000&series=mozilla-central,1651963,1,4&series=mozilla-inbound,1643517,1,4&series=autoland,1651004,1,4&series=mozilla-central,1893061,1,4&series=mozilla-inbound,1893225,1,4&series=autoland,1885896,1,4 [regression view]]* [https://treeherder.mozilla.org/perf.html#/graphs?timerange=31536000&series=mozilla-central,1653935,1,4 Resident Memory - Windows] [https://treeherder.mozilla.org/perf.html#/graphs?timerange=31536000&series=mozilla-central,1784212,1,4&series=mozilla-inbound,1784162,1,4&series=autoland,1784052,1,4&series=mozilla-central,1893325,1,4&series=mozilla-inbound,17841621893275,1,4&series=autoland,1885410,1,4 [regression view]]
* [https://treeherder.mozilla.org/perf.html#/graphs?timerange=31536000&series=mozilla-central,1651894,1,4 Resident Memory - OSX] [https://treeherder.mozilla.org/perf.html#/graphs?timerange=31536000&series=mozilla-central,1651894,1,4&series=mozilla-inbound,1642686,1,4&series=autoland,1650713,1,4 [regression view]]