diff --git a/tracker/tracker/src/main/utils.ts b/tracker/tracker/src/main/utils.ts
index ca4a5ddd9..0891d0aaf 100644
--- a/tracker/tracker/src/main/utils.ts
+++ b/tracker/tracker/src/main/utils.ts
@@ -1,6 +1,12 @@
-export function timestamp(): number {
-  return Math.round(performance.now()) + performance.timing.navigationStart
-}
+export const IN_BROWSER = !(typeof window === 'undefined')
+
+const navigationStart: number | false =
+  (IN_BROWSER && performance.timing.navigationStart) || performance.timeOrigin
+// performance.now() is buggy in some browsers
+export const timestamp: () => number =
+  IN_BROWSER && performance.now() && navigationStart
+    ? () => Math.round(performance.now() + navigationStart)
+    : () => Date.now()
 
 export const stars: (str: string) => string =
   'repeat' in String.prototype
@@ -16,8 +22,6 @@ export function isURL(s: string): boolean {
   return s.startsWith('https://') || s.startsWith('http://')
 }
 
-export const IN_BROWSER = !(typeof window === 'undefined')
-
 // TODO: JOIN IT WITH LOGGER somehow (use logging decorators?); Don't forget about index.js loggin when there is no logger instance.
 
 export const DOCS_HOST = 'https://docs.openreplay.com'