Backed out changeset 905555709846 (bug 1435296) for mochitest GPU failures on /browser_profiling-webgl.js. CLOSED TREE

modules/libpref/init/all.js

@@ -1409,7 +1409,7 @@ pref("privacy.resistFingerprinting", false);
 //   File.lastModified, audioContext.currentTime, canvas.captureStream.currentTime
 pref("privacy.reduceTimerPrecision", true);
 // Dynamically tune the resolution of the timer reduction for both of the two above prefs
-pref("privacy.resistFingerprinting.reduceTimerPrecision.microseconds", 2000);
+pref("privacy.resistFingerprinting.reduceTimerPrecision.microseconds", 20);
 // Lower the priority of network loads for resources on the tracking protection list.
 // Note that this requires the privacy.trackingprotection.annotate_channels pref to be on in order to have any effect.
 #ifdef NIGHTLY_BUILD

toolkit/components/resistfingerprinting/nsRFPService.cpp

@@ -43,7 +43,7 @@ static mozilla::LazyLogModule gResistFingerprintingLog("nsResistFingerprinting")
 #define RESIST_FINGERPRINTING_PREF "privacy.resistFingerprinting"
 #define RFP_TIMER_PREF "privacy.reduceTimerPrecision"
 #define RFP_TIMER_VALUE_PREF "privacy.resistFingerprinting.reduceTimerPrecision.microseconds"
-#define RFP_TIMER_VALUE_DEFAULT 2000
+#define RFP_TIMER_VALUE_DEFAULT 20
 #define RFP_SPOOFED_FRAMES_PER_SEC_PREF "privacy.resistFingerprinting.video_frames_per_sec"
 #define RFP_SPOOFED_DROPPED_RATIO_PREF  "privacy.resistFingerprinting.video_dropped_ratio"
 #define RFP_TARGET_VIDEO_RES_PREF "privacy.resistFingerprinting.target_video_res"