--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -4638,17 +4638,24 @@
               }
               if (this.blankTab && !this.blankTab.linkedBrowser) {
                 this.blankTab = null;
               }
               if (this.spinnerTab && !this.spinnerTab.linkedBrowser) {
                 this.spinnerHidden();
                 this.spinnerTab = null;
               }
-              if (this.loadingTab && !this.loadingTab.linkedBrowser) {
+
+              let loadingTabIsMissingOrCrashed =
+                this.loadingTab &&
+                (!this.loadingTab.linkedBrowser ||
+                 (this.loadingTab.linkedBrowser.isRemoteBrowser &&
+                  !this.loadingTab.linkedBrowser.frameLoader.tabParent));
+
+              if (loadingTabIsMissingOrCrashed) {
                 this.loadingTab = null;
                 this.clearTimer(this.loadTimer);
                 this.loadTimer = null;
               }
             },
 
             // This code runs after we've responded to an event or requested a new
             // tab. It's expected that we've already updated all the principal