davehunt/memchaser — comment on commit 0fa1d8cc44c61e780bedf00d54aac96b1f674234
File: extension/lib/garbage-collector.js line 43
By whimboo:

ACR where the current values are stored in a pref which name got '.previous' appended. Not sure what the general rule is in how to backup preferences. We should find it out. Best ask in the amo-editors channel.