Bug 1705547 - Null check the SessionHistory object before attempting to collect, r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D112290
2021-04-16 12:02:17 +00:00
parent 9473526fdb
commit e7ef1c3516
1 changed files with 2 additions and 1 deletions
--- a/browser/components/sessionstore/SessionStore.jsm
+++ b/browser/components/sessionstore/SessionStore.jsm
@@ -1243,7 +1243,8 @@ var SessionStoreInternal = {

    if (
      Services.appinfo.sessionHistoryInParent &&
-      aBrowsingContext === aBrowsingContext.top
+      aBrowsingContext === aBrowsingContext.top &&
+      aBrowsingContext.sessionHistory
    ) {
      if (!this._browserSHistoryListener.has(aBrowser.permanentKey)) {
        this.addSHistoryListener(aBrowser, aBrowsingContext);