1 files changed, 17 insertions, 0 deletions
diff --git a/testing/mochitest/mochitest-e10s-utils.js b/testing/mochitest/mochitest-e10s-utils.js
new file mode 100644
index 0000000000..716e473c0c
--- /dev/null
+++ b/testing/mochitest/mochitest-e10s-utils.js
@@ -0,0 +1,17 @@
+// Utilities for running tests in an e10s environment.
+
+function e10s_init() {
+  // Listen for an 'oop-browser-crashed' event and log it so people analysing
+  // test logs have a clue about what is going on.
+  window.addEventListener(
+    "oop-browser-crashed",
+    event => {
+      let uri = event.target.currentURI;
+      console.error(
+        "remote browser crashed while on",
+        uri ? uri.spec : "<unknown>"
+      );
+    },
+    true
+  );
+}