This patch is adapted from Tor bug 1517.
To offer some protection against timing attacks by JS content pages, in this
patch we round the various time-exposing APIs (such as Date and
Event.timeStamps) to the nearest 100 ms when the pref "privacy.resistFingerprinting" is on.
MozReview-Commit-ID: eGucM9nGTn
--HG--
extra : rebase_source : 3ee600b07943f3954e9a2a9561391f2f7821bb86