Silently ignore missing warnAboutClosingWindow() in SeaMonkey:

SeaMonkey doesn't send "last-pb-context-exiting" notifications for now (workaround for #53, part 9)
Infocatcher · May 4, 2013 · 13beec0 · 13beec0
1 parent f9825b1
commit 13beec0
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/bootstrap.js b/bootstrap.js
@@ -442,6 +442,8 @@ var windowsObserver = {
 		);
 	},
 	patchWarnAboutClosingWindow: function(window, applyPatch, forceDestroy) {
+		if(this.isSeaMonkey && !("warnAboutClosingWindow" in window))
+			return;
 		this.overridePrivateBrowsingUtils(
 			window,
 			window,