diff --git a/dom/indexedDB/ActorsChild.cpp b/dom/indexedDB/ActorsChild.cpp
index 30dc9b6dab..85f876cdc1 100644
--- a/dom/indexedDB/ActorsChild.cpp
+++ b/dom/indexedDB/ActorsChild.cpp
@@ -3291,6 +3291,10 @@ BackgroundCursorChild::HandleResponse(
   auto& responses =
     const_cast<nsTArray<ObjectStoreCursorResponse>&>(aResponses);
 
+  // If a new cursor is created, we need to keep a reference to it until the
+  // ResultHelper creates a DOM Binding.
+  RefPtr<IDBCursor> newCursor;
+
   for (ObjectStoreCursorResponse& response : responses) {
     StructuredCloneReadInfo cloneReadInfo(Move(response.cloneInfo()));
     cloneReadInfo.mDatabase = mTransaction->Database();
@@ -3300,8 +3304,6 @@ BackgroundCursorChild::HandleResponse(
                                     nullptr,
                                     cloneReadInfo.mFiles);
 
-    RefPtr<IDBCursor> newCursor;
-
     if (mCursor) {
       mCursor->Reset(Move(response.key()), Move(cloneReadInfo));
     } else {
diff --git a/gfx/layers/composite/TextureHost.cpp b/gfx/layers/composite/TextureHost.cpp
index b342f1d184..8df7af4a80 100644
--- a/gfx/layers/composite/TextureHost.cpp
+++ b/gfx/layers/composite/TextureHost.cpp
@@ -555,6 +555,14 @@ void
 BufferTextureHost::DeallocateDeviceData()
 {
   if (mFirstSource && mFirstSource->NumCompositableRefs() > 0) {
+    // WrappingTextureSourceYCbCrBasic wraps YUV format BufferTextureHost.
+    // When BufferTextureHost is destroyed, data of
+    // WrappingTextureSourceYCbCrBasic becomes invalid.
+    if (mFirstSource->AsWrappingTextureSourceYCbCrBasic() &&
+        mFirstSource->IsOwnedBy(this)) {
+      mFirstSource->SetOwner(nullptr);
+      mFirstSource->DeallocateDeviceData();
+    }
     return;
   }
 
diff --git a/netwerk/protocol/http/nsHttpHandler.cpp b/netwerk/protocol/http/nsHttpHandler.cpp
index 0f4c942021..2691a2a77c 100644
--- a/netwerk/protocol/http/nsHttpHandler.cpp
+++ b/netwerk/protocol/http/nsHttpHandler.cpp
@@ -199,7 +199,7 @@ nsHttpHandler::nsHttpHandler()
     , mLegacyAppVersion("5.0")
     , mProduct("Goanna")
     , mCompatFirefoxEnabled(false)
-    , mCompatFirefoxVersion("52.9")
+    , mCompatFirefoxVersion("68.9")
     , mUserAgentIsDirty(true)
     , mAcceptLanguagesIsDirty(true)
     , mPromptTempRedirect(true)
diff --git a/parser/html/java/htmlparser/src/nu/validator/htmlparser/impl/TreeBuilder.java b/parser/html/java/htmlparser/src/nu/validator/htmlparser/impl/TreeBuilder.java
index d77715a3e1..cc60f4c4bb 100644
--- a/parser/html/java/htmlparser/src/nu/validator/htmlparser/impl/TreeBuilder.java
+++ b/parser/html/java/htmlparser/src/nu/validator/htmlparser/impl/TreeBuilder.java
@@ -717,8 +717,6 @@ public abstract class TreeBuilder<T> implements TokenHandler,
                     tokenizer.setState(Tokenizer.DATA);
                 }
             }
-            contextName = null;
-            contextNode = null;
         } else {
             mode = INITIAL;
             // If we are viewing XML source, put a foreign element permanently
@@ -1627,6 +1625,8 @@ public abstract class TreeBuilder<T> implements TokenHandler,
     public final void endTokenization() throws SAXException {
         formPointer = null;
         headPointer = null;
+        contextName = null;
+        contextNode = null;
         deepTreeSurrogateParent = null;
         templateModeStack = null;
         if (stack != null) {
diff --git a/parser/html/nsHtml5TreeBuilder.cpp b/parser/html/nsHtml5TreeBuilder.cpp
index 050df1f941..efbc339675 100644
--- a/parser/html/nsHtml5TreeBuilder.cpp
+++ b/parser/html/nsHtml5TreeBuilder.cpp
@@ -141,8 +141,6 @@ nsHtml5TreeBuilder::startTokenization(nsHtml5Tokenizer* self)
         tokenizer->setState(nsHtml5Tokenizer::DATA);
       }
     }
-    contextName = nullptr;
-    contextNode = nullptr;
   } else {
     mode = INITIAL;
     if (tokenizer->isViewingXmlSource()) {
@@ -578,6 +576,8 @@ nsHtml5TreeBuilder::endTokenization()
 {
   formPointer = nullptr;
   headPointer = nullptr;
+  contextName = nullptr;
+  contextNode = nullptr;
   deepTreeSurrogateParent = nullptr;
   templateModeStack = nullptr;
   if (stack) {
diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp
index c880daef9d..929d8079cb 100644
--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -4139,45 +4139,49 @@ XRE_InitCommandLine(int aArgc, char* aArgv[])
   delete[] canonArgs;
 #endif
 
-  const char *path = nullptr;
-  ArgResult ar = CheckArg("greomni", true, &path);
-  if (ar == ARG_BAD) {
-    PR_fprintf(PR_STDERR, 
-               "Error: argument --greomni requires a path argument or the "
-               "--osint argument was specified with the --greomni argument "
-               "which is invalid.\n");
-    return NS_ERROR_FAILURE;
-  }
+  if (PR_GetEnv("UXP_CUSTOM_OMNI")) {
+    // Process CLI parameters for specifying custom omnijars
+    const char *path = nullptr;
+    ArgResult ar = CheckArg("greomni", true, &path);
+    if (ar == ARG_BAD) {
+      PR_fprintf(PR_STDERR, 
+                 "Error: argument --greomni requires a path argument or the "
+                 "--osint argument was specified with the --greomni argument "
+                 "which is invalid.\n");
+      return NS_ERROR_FAILURE;
+    }
 
-  if (!path)
-    return rv;
+    if (!path)
+      return rv;
 
-  nsCOMPtr<nsIFile> greOmni;
-  rv = XRE_GetFileFromPath(path, getter_AddRefs(greOmni));
-  if (NS_FAILED(rv)) {
-    PR_fprintf(PR_STDERR, "Error: argument --greomni requires a valid path\n");
-    return rv;
-  }
+    nsCOMPtr<nsIFile> greOmni;
+    rv = XRE_GetFileFromPath(path, getter_AddRefs(greOmni));
+    if (NS_FAILED(rv)) {
+      PR_fprintf(PR_STDERR, "Error: argument --greomni requires a valid path\n");
+      return rv;
+    }
 
-  ar = CheckArg("appomni", true, &path);
-  if (ar == ARG_BAD) {
-    PR_fprintf(PR_STDERR,
-               "Error: argument --appomni requires a path argument or the "
-               "--osint argument was specified with the --appomni argument "
-               "which is invalid.\n");
-    return NS_ERROR_FAILURE;
-  }
+    ar = CheckArg("appomni", true, &path);
+    if (ar == ARG_BAD) {
+      PR_fprintf(PR_STDERR,
+                 "Error: argument --appomni requires a path argument or the "
+                 "--osint argument was specified with the --appomni argument "
+                 "which is invalid.\n");
+      return NS_ERROR_FAILURE;
+    }
 
-  nsCOMPtr<nsIFile> appOmni;
-  if (path) {
-      rv = XRE_GetFileFromPath(path, getter_AddRefs(appOmni));
-      if (NS_FAILED(rv)) {
-        PR_fprintf(PR_STDERR, "Error: argument --appomni requires a valid path\n");
-        return rv;
-      }
-  }
+    nsCOMPtr<nsIFile> appOmni;
+    if (path) {
+        rv = XRE_GetFileFromPath(path, getter_AddRefs(appOmni));
+        if (NS_FAILED(rv)) {
+          PR_fprintf(PR_STDERR, "Error: argument --appomni requires a valid path\n");
+          return rv;
+        }
+    }
+
+    mozilla::Omnijar::Init(greOmni, appOmni);
+  } // UXP_CUSTOM_OMNI
 
-  mozilla::Omnijar::Init(greOmni, appOmni);
   return rv;
 }