--- a/toolkit/crashreporter/nsExceptionHandler.cpp
+++ b/toolkit/crashreporter/nsExceptionHandler.cpp
@@ -921,17 +921,20 @@ bool MinidumpCallback(
 #ifdef XP_LINUX
       OpenAPIData(apiData, descriptor.path());
 #else
       OpenAPIData(apiData, dump_path, minidump_id);
 #endif
       apiData.WriteBuffer(crashReporterAPIData->get(), crashReporterAPIData->Length());
     }
     WriteAnnotation(apiData, "CrashTime", crashTimeString);
+    WriteAnnotation(eventFile, "CrashTime", crashTimeString);
+
     WriteAnnotation(apiData, "UptimeTS", uptimeTSString);
+    WriteAnnotation(eventFile, "UptimeTS", uptimeTSString);
 
     if (timeSinceLastCrash != 0) {
       WriteAnnotation(apiData, "SecondsSinceLastCrash",
                       timeSinceLastCrashString);
       WriteAnnotation(eventFile, "SecondsSinceLastCrash",
                       timeSinceLastCrashString);
     }
     if (isGarbageCollecting) {

--- a/toolkit/crashreporter/test/unit/test_event_files.js
+++ b/toolkit/crashreporter/test/unit/test_event_files.js
@@ -44,10 +44,13 @@ add_task(function* test_main_process_cra
   Assert.equal(count, 1, "A single crash event file was seen.");
   let crashes = yield cm.getCrashes();
   Assert.equal(crashes.length, 1);
   let crash = crashes[0];
   Assert.ok(crash.isOfType(cm.PROCESS_TYPE_MAIN, cm.CRASH_TYPE_CRASH));
   Assert.equal(crash.id + ".dmp", basename, "ID recorded properly");
   Assert.equal(crash.metadata.ShutdownProgress, "event-test");
   Assert.ok("TelemetrySessionId" in crash.metadata);
+  Assert.ok("UptimeTS" in crash.metadata);
   Assert.ok(/^[0-9a-f]{8}\-([0-9a-f]{4}\-){3}[0-9a-f]{12}$/.test(crash.metadata.TelemetrySessionId));
+  Assert.ok("CrashTime" in crash.metadata);
+  Assert.ok(/^\d+$/.test(crash.metadata.CrashTime));
 });