diff --git a/src/profile-logic/process-profile.js b/src/profile-logic/process-profile.js
index 55a256b7ea..b299c5e6f9 100644
--- a/src/profile-logic/process-profile.js
+++ b/src/profile-logic/process-profile.js
@@ -1697,6 +1697,12 @@ export function processGeckoProfile(geckoProfile: GeckoProfile): Profile {
   const meta: ProfileMeta = {
     interval: geckoProfile.meta.interval,
     startTime: geckoProfile.meta.startTime,
+    startTimeAsClockMonotonicNanosecondsSinceBoot:
+      geckoProfile.meta.startTimeAsClockMonotonicNanosecondsSinceBoot,
+    startTimeAsMachAbsoluteTimeNanoseconds:
+      geckoProfile.meta.startTimeAsMachAbsoluteTimeNanoseconds,
+    startTimeAsQueryPerformanceCounterValue:
+      geckoProfile.meta.startTimeAsQueryPerformanceCounterValue,
     abi: geckoProfile.meta.abi,
     extensions: extensions,
     misc: geckoProfile.meta.misc,
diff --git a/src/test/unit/__snapshots__/profile-conversion.test.js.snap b/src/test/unit/__snapshots__/profile-conversion.test.js.snap
index 0b145f6c67..02b5b34647 100644
--- a/src/test/unit/__snapshots__/profile-conversion.test.js.snap
+++ b/src/test/unit/__snapshots__/profile-conversion.test.js.snap
@@ -563,6 +563,9 @@ Object {
     "sourceURL": undefined,
     "stackwalk": 1,
     "startTime": 0,
+    "startTimeAsClockMonotonicNanosecondsSinceBoot": undefined,
+    "startTimeAsMachAbsoluteTimeNanoseconds": undefined,
+    "startTimeAsQueryPerformanceCounterValue": undefined,
     "symbolicated": true,
     "toolkit": undefined,
     "updateChannel": undefined,
@@ -86311,6 +86314,9 @@ Object {
     "sourceURL": undefined,
     "stackwalk": 1,
     "startTime": 0,
+    "startTimeAsClockMonotonicNanosecondsSinceBoot": undefined,
+    "startTimeAsMachAbsoluteTimeNanoseconds": undefined,
+    "startTimeAsQueryPerformanceCounterValue": undefined,
     "symbolicated": true,
     "toolkit": undefined,
     "updateChannel": undefined,
@@ -449906,6 +449912,9 @@ Object {
     "sourceURL": undefined,
     "stackwalk": 1,
     "startTime": 2574592839.818,
+    "startTimeAsClockMonotonicNanosecondsSinceBoot": undefined,
+    "startTimeAsMachAbsoluteTimeNanoseconds": undefined,
+    "startTimeAsQueryPerformanceCounterValue": undefined,
     "symbolicated": true,
     "toolkit": undefined,
     "updateChannel": undefined,
@@ -456166,6 +456175,9 @@ Object {
     "sourceURL": undefined,
     "stackwalk": 1,
     "startTime": 2782992.2430000002,
+    "startTimeAsClockMonotonicNanosecondsSinceBoot": undefined,
+    "startTimeAsMachAbsoluteTimeNanoseconds": undefined,
+    "startTimeAsQueryPerformanceCounterValue": undefined,
     "symbolicated": true,
     "toolkit": undefined,
     "updateChannel": undefined,
@@ -471051,6 +471063,9 @@ Object {
     "sourceURL": undefined,
     "stackwalk": 1,
     "startTime": 36556170.907,
+    "startTimeAsClockMonotonicNanosecondsSinceBoot": undefined,
+    "startTimeAsMachAbsoluteTimeNanoseconds": undefined,
+    "startTimeAsQueryPerformanceCounterValue": undefined,
     "symbolicated": true,
     "toolkit": undefined,
     "updateChannel": undefined,
@@ -477245,6 +477260,9 @@ Object {
     "sourceURL": undefined,
     "stackwalk": 1,
     "startTime": 115539936.601,
+    "startTimeAsClockMonotonicNanosecondsSinceBoot": undefined,
+    "startTimeAsMachAbsoluteTimeNanoseconds": undefined,
+    "startTimeAsQueryPerformanceCounterValue": undefined,
     "symbolicated": true,
     "toolkit": undefined,
     "updateChannel": undefined,
diff --git a/src/test/unit/__snapshots__/profile-upgrading.test.js.snap b/src/test/unit/__snapshots__/profile-upgrading.test.js.snap
index 70b9dba30b..ba5c8243d6 100644
--- a/src/test/unit/__snapshots__/profile-upgrading.test.js.snap
+++ b/src/test/unit/__snapshots__/profile-upgrading.test.js.snap
@@ -47,6 +47,9 @@ Object {
     "sourceURL": undefined,
     "stackwalk": 1,
     "startTime": 2574592839.818,
+    "startTimeAsClockMonotonicNanosecondsSinceBoot": undefined,
+    "startTimeAsMachAbsoluteTimeNanoseconds": undefined,
+    "startTimeAsQueryPerformanceCounterValue": undefined,
     "symbolicated": true,
     "toolkit": undefined,
     "updateChannel": undefined,
diff --git a/src/types/gecko-profile.js b/src/types/gecko-profile.js
index a96f8680d2..b74cbaa174 100644
--- a/src/types/gecko-profile.js
+++ b/src/types/gecko-profile.js
@@ -405,6 +405,9 @@ export type GeckoProfileShortMeta = {|
   // When the main process started. Timestamp expressed in milliseconds since
   // midnight January 1, 1970 GMT.
   startTime: Milliseconds,
+  startTimeAsClockMonotonicNanosecondsSinceBoot?: number,
+  startTimeAsMachAbsoluteTimeNanoseconds?: number,
+  startTimeAsQueryPerformanceCounterValue?: number,
   shutdownTime: Milliseconds | null,
   categories: CategoryList,
   markerSchema: GeckoMetaMarkerSchema[],
diff --git a/src/types/profile.js b/src/types/profile.js
index 15a313a119..9c74d197be 100644
--- a/src/types/profile.js
+++ b/src/types/profile.js
@@ -768,6 +768,9 @@ export type ProfileMeta = {|
   // When the main process started. Timestamp expressed in milliseconds since
   // midnight January 1, 1970 GMT.
   startTime: Milliseconds,
+  startTimeAsClockMonotonicNanosecondsSinceBoot?: number,
+  startTimeAsMachAbsoluteTimeNanoseconds?: number,
+  startTimeAsQueryPerformanceCounterValue?: number,
   // The number of milliseconds since midnight January 1, 1970 GMT.
   endTime?: Milliseconds,
   // When the recording started (in milliseconds after startTime).