From 074adbab248d577a460d2dd6926a7a76cb413fac Mon Sep 17 00:00:00 2001
From: JustOff <Off.Just.Off@gmail.com>
Date: Sat, 6 Oct 2018 15:05:00 +0300
Subject: [PATCH] [BASILISK] Protect against nsIPrincipal.origin throwing for
 about:blank iframes and custom protocols

---
 .../basilisk/components/sessionstore/SessionStorage.jsm  | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/application/basilisk/components/sessionstore/SessionStorage.jsm b/application/basilisk/components/sessionstore/SessionStorage.jsm
index 705139ebfd..7499f95e96 100644
--- a/application/basilisk/components/sessionstore/SessionStorage.jsm
+++ b/application/basilisk/components/sessionstore/SessionStorage.jsm
@@ -74,7 +74,14 @@ var SessionStorageInternal = {
 
       // Get the origin of the current history entry
       // and use that as a key for the per-principal storage data.
-      let origin = principal.origin;
+      let origin;
+      try {
+        // The origin getter may throw for about:blank iframes as of bug 1340710,
+        // but we should ignore them anyway. The same goes for custom protocols.
+        origin = principal.origin;
+      } catch (e) {
+        return;
+      }
       if (visitedOrigins.has(origin)) {
         // Don't read a host twice.
         return;