diff --git a/experimental/puppeteer-firefox/lib/ExecutionContext.js b/experimental/puppeteer-firefox/lib/ExecutionContext.js
index d74c12fc2e5..26ccb7b2dfd 100644
--- a/experimental/puppeteer-firefox/lib/ExecutionContext.js
+++ b/experimental/puppeteer-firefox/lib/ExecutionContext.js
@@ -67,7 +67,7 @@ class ExecutionContext {
         executionContextId: this._executionContextId
       });
     } catch (err) {
-      if (err instanceof TypeError && err.message === 'Converting circular structure to JSON')
+      if (err instanceof TypeError && err.message.startsWith('Converting circular structure to JSON'))
         err.message += ' Are you passing a nested JSHandle?';
       throw err;
     }
diff --git a/lib/ExecutionContext.js b/lib/ExecutionContext.js
index 9a4ac6236b7..cda3899d1ee 100644
--- a/lib/ExecutionContext.js
+++ b/lib/ExecutionContext.js
@@ -113,7 +113,7 @@ class ExecutionContext {
         userGesture: true
       });
     } catch (err) {
-      if (err instanceof TypeError && err.message === 'Converting circular structure to JSON')
+      if (err instanceof TypeError && err.message.startsWith('Converting circular structure to JSON'))
         err.message += ' Are you passing a nested JSHandle?';
       throw err;
     }