diff --git a/mozglue/misc/AwakeTimeStamp.cpp b/mozglue/misc/AwakeTimeStamp.cpp
index ca7d2a75cdf7..a67c3e49a8aa 100644
--- a/mozglue/misc/AwakeTimeStamp.cpp
+++ b/mozglue/misc/AwakeTimeStamp.cpp
@@ -31,11 +31,26 @@ double AwakeTimeDuration::ToMicroseconds() const {
   return static_cast<double>(mValueUs);
 }
 
+AwakeTimeDuration AwakeTimeDuration::FromSeconds(uint64_t aSeconds) {
+  return AwakeTimeDuration(aSeconds * 1000000);
+}
+AwakeTimeDuration AwakeTimeDuration::FromMilliseconds(uint64_t aMilliseconds) {
+  return AwakeTimeDuration(aMilliseconds * 1000);
+}
+AwakeTimeDuration AwakeTimeDuration::FromMicroseconds(uint64_t aMicroseconds) {
+  return AwakeTimeDuration(aMicroseconds);
+}
+
 AwakeTimeDuration AwakeTimeStamp::operator-(
     AwakeTimeStamp const& aOther) const {
   return AwakeTimeDuration(mValueUs - aOther.mValueUs);
 }
 
+AwakeTimeStamp AwakeTimeStamp::operator-(
+    AwakeTimeDuration const& aOther) const {
+  return AwakeTimeStamp(mValueUs - aOther.mValueUs);
+}
+
 AwakeTimeStamp AwakeTimeStamp::operator+(
     const AwakeTimeDuration& aDuration) const {
   return AwakeTimeStamp(mValueUs + aDuration.mValueUs);
diff --git a/mozglue/misc/AwakeTimeStamp.h b/mozglue/misc/AwakeTimeStamp.h
index 7549dfdb602f..e38405beab9c 100644
--- a/mozglue/misc/AwakeTimeStamp.h
+++ b/mozglue/misc/AwakeTimeStamp.h
@@ -53,6 +53,7 @@ class AwakeTimeStamp {
     return !(*this == aOther);
   }
   MFBT_API AwakeTimeDuration operator-(AwakeTimeStamp const& aOther) const;
+  MFBT_API AwakeTimeStamp operator-(AwakeTimeDuration const& aOther) const;
   MFBT_API AwakeTimeStamp operator+(const AwakeTimeDuration& aDuration) const;
 
  private:
@@ -74,6 +75,9 @@ class AwakeTimeDuration {
   MFBT_API double ToSeconds() const;
   MFBT_API double ToMilliseconds() const;
   MFBT_API double ToMicroseconds() const;
+  static MFBT_API AwakeTimeDuration FromSeconds(uint64_t aSeconds);
+  static MFBT_API AwakeTimeDuration FromMilliseconds(uint64_t aMilliseconds);
+  static MFBT_API AwakeTimeDuration FromMicroseconds(uint64_t aMicroseconds);
   MFBT_API void operator+=(const AwakeTimeDuration& aDuration) {
     mValueUs += aDuration.mValueUs;
   }