diff --git a/dom/base/Link.h b/dom/base/Link.h
index 0974d6108c..99a5735110 100644
--- a/dom/base/Link.h
+++ b/dom/base/Link.h
@@ -13,6 +13,7 @@
 #include "mozilla/IHistory.h"
 #include "mozilla/MemoryReporting.h"
 #include "nsIContent.h" // for nsLinkState
+#include "nsIContentPolicyBase.h" // for nsContentPolicyType
 
 namespace mozilla {
 
diff --git a/dom/canvas/CanvasRenderingContext2D.cpp b/dom/canvas/CanvasRenderingContext2D.cpp
index d994716d32..5d5490206d 100644
--- a/dom/canvas/CanvasRenderingContext2D.cpp
+++ b/dom/canvas/CanvasRenderingContext2D.cpp
@@ -4171,7 +4171,7 @@ struct MOZ_STACK_CLASS CanvasBidiProcessor : public nsBidiPresUtils::BidiProcess
   already_AddRefed<gfxPattern> GetPatternFor(Style aStyle)
   {
     const CanvasPattern* pat = mCtx->CurrentState().patternStyles[aStyle];
-    RefPtr<gfxPattern> pattern = new gfxPattern(pat->mSurface, Matrix());
+    RefPtr<gfxPattern> pattern = new gfxPattern(pat->mSurface, pat->mTransform);
     pattern->SetExtend(CvtCanvasRepeatToGfxRepeat(pat->mRepeat));
     return pattern.forget();
   }
diff --git a/dom/html/HTMLSlotElement.cpp b/dom/html/HTMLSlotElement.cpp
index 9286ff9591..eb5b48c22a 100644
--- a/dom/html/HTMLSlotElement.cpp
+++ b/dom/html/HTMLSlotElement.cpp
@@ -10,6 +10,7 @@
 #include "mozilla/dom/ShadowRoot.h"
 #include "nsGkAtoms.h"
 #include "nsDocument.h"
+#include "nsLayoutUtils.h"
 
 nsGenericHTMLElement*
 NS_NewHTMLSlotElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
diff --git a/dom/html/TextTrackManager.cpp b/dom/html/TextTrackManager.cpp
index 1809478f2d..4b69675a0d 100644
--- a/dom/html/TextTrackManager.cpp
+++ b/dom/html/TextTrackManager.cpp
@@ -11,6 +11,7 @@
 #include "mozilla/dom/TextTrackCue.h"
 #include "mozilla/dom/Event.h"
 #include "mozilla/ClearOnShutdown.h"
+#include "mozilla/CycleCollectedJSContext.h"
 #include "nsComponentManagerUtils.h"
 #include "nsVariant.h"
 #include "nsVideoFrame.h"
diff --git a/dom/html/nsHTMLDNSPrefetch.cpp b/dom/html/nsHTMLDNSPrefetch.cpp
index 1b91d8041d..2f55f9672b 100644
--- a/dom/html/nsHTMLDNSPrefetch.cpp
+++ b/dom/html/nsHTMLDNSPrefetch.cpp
@@ -15,6 +15,7 @@
 #include "nsNetUtil.h"
 #include "nsNetCID.h"
 #include "nsIProtocolHandler.h"
+#include "nsContentUtils.h"
 
 #include "nsIDNSListener.h"
 #include "nsIWebProgressListener.h"
diff --git a/netwerk/protocol/http/nsCORSListenerProxy.cpp b/netwerk/protocol/http/nsCORSListenerProxy.cpp
index add904092a..fdb6bb97e5 100644
--- a/netwerk/protocol/http/nsCORSListenerProxy.cpp
+++ b/netwerk/protocol/http/nsCORSListenerProxy.cpp
@@ -215,15 +215,18 @@ static bool EnsurePreflightCache()
 void
 nsPreflightCache::CacheEntry::PurgeExpired(TimeStamp now)
 {
-  uint32_t i;
-  for (i = 0; i < mMethods.Length(); ++i) {
+  for (uint32_t i = 0, len = mMethods.Length(); i < len; ++i) {
     if (now >= mMethods[i].expirationTime) {
-      mMethods.RemoveElementAt(i--);
+      mMethods.UnorderedRemoveElementAt(i);
+      --i; // Examine the element again, if necessary.
+      --len;
     }
   }
-  for (i = 0; i < mHeaders.Length(); ++i) {
+  for (uint32_t i = 0, len = mHeaders.Length(); i < len; ++i) {
     if (now >= mHeaders[i].expirationTime) {
-      mHeaders.RemoveElementAt(i--);
+      mHeaders.UnorderedRemoveElementAt(i);
+      --i; // Examine the element again, if necessary.
+      --len;
     }
   }
 }
@@ -235,25 +238,26 @@ nsPreflightCache::CacheEntry::CheckRequest(const nsCString& aMethod,
   PurgeExpired(TimeStamp::NowLoRes());
 
   if (!aMethod.EqualsLiteral("GET") && !aMethod.EqualsLiteral("POST")) {
-    uint32_t i;
-    for (i = 0; i < mMethods.Length(); ++i) {
-      if (aMethod.Equals(mMethods[i].token))
-        break;
-    }
-    if (i == mMethods.Length()) {
+    struct CheckToken {
+      bool Equals(const TokenTime& e, const nsCString& method) const {
+        return e.token.Equals(method);
+      }
+    };
+
+    if (!mMethods.Contains(aMethod, CheckToken())) {
       return false;
     }
   }
 
-  for (uint32_t i = 0; i < aHeaders.Length(); ++i) {
-    uint32_t j;
-    for (j = 0; j < mHeaders.Length(); ++j) {
-      if (aHeaders[i].Equals(mHeaders[j].token,
-                             nsCaseInsensitiveCStringComparator())) {
-        break;
-      }
+  struct CheckHeaderToken {
+    bool Equals(const TokenTime& e, const nsCString& header) const {
+      return e.token.Equals(header, comparator);
     }
-    if (j == mHeaders.Length()) {
+
+    const nsCaseInsensitiveCStringComparator comparator;
+  } checker;
+  for (uint32_t i = 0; i < aHeaders.Length(); ++i) {
+    if (!mHeaders.Contains(aHeaders[i], checker)) {
       return false;
     }
   }
@@ -1382,8 +1386,8 @@ nsCORSPreflightListener::CheckPreflightRequestApproved(nsIRequest* aRequest)
         ) {
       continue;
     }
-    if (!headers.Contains(mPreflightHeaders[i],
-                          nsCaseInsensitiveCStringArrayComparator())) {
+    const auto& comparator = nsCaseInsensitiveCStringArrayComparator();
+    if (!headers.Contains(mPreflightHeaders[i], comparator)) {
       LogBlockedRequest(aRequest, "CORSMissingAllowHeaderFromPreflight",
                         NS_ConvertUTF8toUTF16(mPreflightHeaders[i]).get());
       return NS_ERROR_DOM_BAD_URI;