diff --git a/docshell/base/nsDocShell.cpp b/docshell/base/nsDocShell.cpp
index bf5c1bb5398a..a5f7b0981ebd 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -10871,10 +10871,7 @@ nsDocShell::DoChannelLoad(nsIChannel* aChannel,
 
   // If the user pressed shift-reload, then do not allow ServiceWorker
   // interception to occur. See step 12.1 of the SW HandleFetch algorithm.
-  if (mLoadType == LOAD_RELOAD_BYPASS_CACHE ||
-      mLoadType == LOAD_RELOAD_BYPASS_PROXY ||
-      mLoadType == LOAD_RELOAD_BYPASS_PROXY_AND_CACHE ||
-      mLoadType == LOAD_RELOAD_ALLOW_MIXED_CONTENT) {
+  if (IsForceReloadType(mLoadType)) {
     nsCOMPtr<nsIHttpChannelInternal> internal = do_QueryInterface(aChannel);
     if (internal) {
       internal->ForceNoIntercept();
@@ -11163,11 +11160,7 @@ nsDocShell::OnNewURI(nsIURI* aURI, nsIChannel* aChannel, nsISupports* aOwner,
    * for the page. Save the new cacheKey in Session History.
    * see bug 90098
    */
-  if (aChannel &&
-      (aLoadType == LOAD_RELOAD_BYPASS_CACHE ||
-       aLoadType == LOAD_RELOAD_BYPASS_PROXY ||
-       aLoadType == LOAD_RELOAD_BYPASS_PROXY_AND_CACHE ||
-       aLoadType == LOAD_RELOAD_ALLOW_MIXED_CONTENT)) {
+  if (aChannel && IsForceReloadType(aLoadType)) {
     NS_ASSERTION(!updateSHistory,
                  "We shouldn't be updating session history for forced"
                  " reloads!");
diff --git a/docshell/base/nsDocShellLoadTypes.h b/docshell/base/nsDocShellLoadTypes.h
index 273dd87b0d61..67304476dfa1 100644
--- a/docshell/base/nsDocShellLoadTypes.h
+++ b/docshell/base/nsDocShellLoadTypes.h
@@ -101,5 +101,17 @@ IsValidLoadType(uint32_t aLoadType)
   return false;
 }
 
+static inline bool
+IsForceReloadType(uint32_t aLoadType) {
+  switch (aLoadType) {
+    case LOAD_RELOAD_BYPASS_CACHE:
+    case LOAD_RELOAD_BYPASS_PROXY:
+    case LOAD_RELOAD_BYPASS_PROXY_AND_CACHE:
+    case LOAD_RELOAD_ALLOW_MIXED_CONTENT:
+      return true;
+  }
+  return false;
+}
+
 #endif // MOZILLA_INTERNAL_API
 #endif
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index 8177411ac6af..dc162816c049 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -33,6 +33,7 @@
 #include "mozilla/css/Loader.h"
 #include "mozilla/css/ImageLoader.h"
 #include "nsDocShell.h"
+#include "nsDocShellLoadTypes.h"
 #include "nsIDocShellTreeItem.h"
 #include "nsCOMArray.h"
 #include "nsQueryObject.h"
@@ -4730,15 +4731,13 @@ nsDocument::SetScriptGlobalObject(nsIScriptGlobalObject *aScriptGlobalObject)
     mTemplateContentsOwner->SetScriptGlobalObject(aScriptGlobalObject);
   }
 
-  nsCOMPtr<nsIChannel> channel = GetChannel();
-  if (!mMaybeServiceWorkerControlled && channel) {
-    nsLoadFlags loadFlags = 0;
-    channel->GetLoadFlags(&loadFlags);
+  if (!mMaybeServiceWorkerControlled && mDocumentContainer && mScriptGlobalObject && GetChannel()) {
+    nsCOMPtr<nsIDocShell> docShell(mDocumentContainer);
+    uint32_t loadType;
+    docShell->GetLoadType(&loadType);
+
     // If we are shift-reloaded, don't associate with a ServiceWorker.
-    // TODO: This should check the nsDocShell definition of shift-reload instead
-    //       of trying to infer it from LOAD_BYPASS_CACHE.  The current code
-    //       will probably cause problems once bug 1120715 lands.
-    if (loadFlags & nsIRequest::LOAD_BYPASS_CACHE) {
+    if (IsForceReloadType(loadType)) {
       NS_WARNING("Page was shift reloaded, skipping ServiceWorker control");
       return;
     }