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-rw-r--r--browser/components/sessionstore/test/browser_394759_purge.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/sessionstore/test/browser_394759_purge.js b/browser/components/sessionstore/test/browser_394759_purge.js
index e5218c9936..ea75d6e4b2 100644
--- a/browser/components/sessionstore/test/browser_394759_purge.js
+++ b/browser/components/sessionstore/test/browser_394759_purge.js
@@ -9,7 +9,7 @@ let { ForgetAboutSite } = ChromeUtils.importESModule(
function promiseClearHistory() {
return new Promise(resolve => {
let observer = {
- observe(aSubject, aTopic, aData) {
+ observe() {
Services.obs.removeObserver(
this,
"browser:purge-session-history-for-domain"