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-rw-r--r--devtools/startup/tests/browser/browser_shim_disable_devtools.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/devtools/startup/tests/browser/browser_shim_disable_devtools.js b/devtools/startup/tests/browser/browser_shim_disable_devtools.js
index 1a16902099..c3a4725a4b 100644
--- a/devtools/startup/tests/browser/browser_shim_disable_devtools.js
+++ b/devtools/startup/tests/browser/browser_shim_disable_devtools.js
@@ -140,7 +140,7 @@ add_task(async function () {
function waitForDelayedStartupFinished(win) {
return new Promise(resolve => {
- Services.obs.addObserver(function observer(subject, topic) {
+ Services.obs.addObserver(function observer(subject) {
if (win == subject) {
Services.obs.removeObserver(
observer,