From e1ea6d240df8bed5dc2e0d6caaff3ded03cfcbe6 Mon Sep 17 00:00:00 2001
From: Pale Moon <git-repo@palemoon.org>
Date: Mon, 13 Mar 2017 23:23:26 +0100
Subject: [PATCH] Don't allow alternate URI changes inside view-source URI
 fixup.

---
 docshell/base/nsDefaultURIFixup.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docshell/base/nsDefaultURIFixup.cpp b/docshell/base/nsDefaultURIFixup.cpp
index 79c918523f..8e5db21544 100644
--- a/docshell/base/nsDefaultURIFixup.cpp
+++ b/docshell/base/nsDefaultURIFixup.cpp
@@ -160,7 +160,10 @@ nsDefaultURIFixup::GetFixupURIInfo(const nsACString& aStringURI,
 
   if (scheme.LowerCaseEqualsLiteral("view-source")) {
     nsCOMPtr<nsIURIFixupInfo> uriInfo;
-    uint32_t newFixupFlags = aFixupFlags & ~FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP;
+    // We disable keyword lookup and alternate URIs so that small typos don't
+    // cause us to look at very different domains
+    uint32_t newFixupFlags = aFixupFlags & ~FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP
+                                         & ~FIXUP_FLAGS_MAKE_ALTERNATE_URI;
 
     rv = GetFixupURIInfo(Substring(uriString,
                                    sizeof("view-source:") - 1,