Bug 1304623 - Create a pref to control the default referrer policy - part 3. r=bkelly

MozReview-Commit-ID: 1A6IHPeNYBQ

browser/base/content/browser.js

@@ -855,7 +855,7 @@ function _loadURIWithFlags(browser, uri, params) {
   let flags = params.flags || 0;
   let referrer = params.referrerURI;
   let referrerPolicy = ('referrerPolicy' in params ? params.referrerPolicy :
-                        Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT);
+                        Ci.nsIHttpChannel.REFERRER_POLICY_UNSET);
   let postData = params.postData;
 
   let currentRemoteType = browser.remoteType;
@@ -1196,7 +1196,7 @@ var gBrowserInit = {
           }
         }
         let referrerPolicy = (window.arguments[5] != undefined ?
-            window.arguments[5] : Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT);
+            window.arguments[5] : Ci.nsIHttpChannel.REFERRER_POLICY_UNSET);
         let userContextId = (window.arguments[6] != undefined ?
             window.arguments[6] : Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID);
         loadURI(uriToLoad, referrerURI, window.arguments[3] || null,
@@ -5014,7 +5014,7 @@ nsBrowserAccess.prototype = {
     }
 
     let referrer = aOpener ? makeURI(aOpener.location.href) : null;
-    let referrerPolicy = Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT;
+    let referrerPolicy = Ci.nsIHttpChannel.REFERRER_POLICY_UNSET;
     if (aOpener && aOpener.document) {
       referrerPolicy = aOpener.document.referrerPolicy;
     }

browser/base/content/tabbrowser.xml

@@ -4846,7 +4846,7 @@
 
               let newTab = this.loadOneTab(data.href, {
                 referrerURI: (data.referrer ? makeURI(data.referrer) : null),
-                referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+                referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
                 postData: null,
                 allowThirdPartyFixup: true,
                 relatedToCurrent: true,

browser/base/content/test/general/browser_close_dependent_tabs.js

@@ -62,7 +62,7 @@ add_task(function* () {
   yield BrowserTestUtils.withNewTab({ gBrowser, url: "data:text/html,a" }, function* (browser1) {
     // Set up the grouped SHEntry setup
     let tab2 = gBrowser.loadOneTab("data:text/html,b", {
-      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
       allowThirdPartyFixup: true,
       relatedToCurrent: true,
       isPrerendered: true,

browser/base/content/utilityOverlay.js

@@ -90,7 +90,7 @@ function openUILink(url, event, aIgnoreButton, aIgnoreAlt, aAllowThirdPartyFixup
       allowThirdPartyFixup: aAllowThirdPartyFixup,
       postData: aPostData,
       referrerURI: aReferrerURI,
-      referrerPolicy: Components.interfaces.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Components.interfaces.nsIHttpChannel.REFERRER_POLICY_UNSET,
       initiatingDoc: event ? event.target.ownerDocument : null,
     };
   }
@@ -185,7 +185,7 @@ function openUILinkIn(url, where, aAllowThirdPartyFixup, aPostData, aReferrerURI
       allowThirdPartyFixup: aAllowThirdPartyFixup,
       postData: aPostData,
       referrerURI: aReferrerURI,
-      referrerPolicy: Components.interfaces.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Components.interfaces.nsIHttpChannel.REFERRER_POLICY_UNSET,
     };
   }
 
@@ -206,7 +206,7 @@ function openLinkIn(url, where, params) {
   var aCharset              = params.charset;
   var aReferrerURI          = params.referrerURI;
   var aReferrerPolicy       = ('referrerPolicy' in params ?
-      params.referrerPolicy : Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT);
+      params.referrerPolicy : Ci.nsIHttpChannel.REFERRER_POLICY_UNSET);
   var aRelatedToCurrent     = params.relatedToCurrent;
   var aAllowMixedContent    = params.allowMixedContent;
   var aInBackground         = params.inBackground;

browser/components/sessionstore/ContentRestore.jsm

@@ -201,7 +201,7 @@ ContentRestoreInternal.prototype = {
                        Utils.makeURI(loadArguments.referrer) : null;
         let referrerPolicy = ('referrerPolicy' in loadArguments
             ? loadArguments.referrerPolicy
-            : Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT);
+            : Ci.nsIHttpChannel.REFERRER_POLICY_UNSET);
         let postData = loadArguments.postData ?
                        Utils.makeInputStream(loadArguments.postData) : null;
 

browser/components/sessionstore/test/browser_grouped_session_store.js

@@ -64,7 +64,7 @@ add_task(function* () {
 
     // Create a new hidden prerendered tab to swap to.
     let tab2 = gBrowser.loadOneTab(URIs[2], {
-      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
       allowThirdPartyFixup: true,
       relatedToCurrent: true,
       isPrerendered: true,
@@ -106,7 +106,7 @@ add_task(function* () {
 
     // Create a new hidden prerendered tab to swap to
     let tab3 = gBrowser.loadOneTab(URIs[4], {
-      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
       allowThirdPartyFixup: true,
       relatedToCurrent: true,
       isPrerendered: true,

devtools/client/responsive.html/browser/web-navigation.js

@@ -60,7 +60,7 @@ BrowserElementWebNavigation.prototype = {
   loadURI(uri, flags, referrer, postData, headers) {
     // No equivalent in the current BrowserElement API
     this.loadURIWithOptions(uri, flags, referrer,
-                            Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+                            Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
                             postData, headers, null);
   },
 

devtools/shared/gcli/commands/screenshot.js

@@ -559,8 +559,7 @@ var saveToFile = Task.async(function* (context, reply) {
   persist.savePrivacyAwareURI(sourceURI,
                               null,
                               document.documentURIObject,
-                              Ci.nsIHttpChannel
+                              Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
-                                .REFERRER_POLICY_NO_REFERRER_WHEN_DOWNGRADE,
                               null,
                               null,
                               targetFileURI,

docshell/base/nsDocShell.cpp

@@ -1262,7 +1262,7 @@ nsDocShell::LoadURI(nsIURI* aURI,
   bool inheritPrincipal = false;
   bool principalIsExplicit = false;
   bool sendReferrer = true;
-  uint32_t referrerPolicy = mozilla::net::RP_Default;
+  uint32_t referrerPolicy = mozilla::net::RP_Unset;
   bool isSrcdoc = false;
   nsCOMPtr<nsISHEntry> shEntry;
   nsXPIDLString target;
@@ -4697,7 +4697,7 @@ nsDocShell::LoadURI(const char16_t* aURI,
                     nsIInputStream* aHeaderStream)
 {
   return LoadURIWithOptions(aURI, aLoadFlags, aReferringURI,
-                            mozilla::net::RP_Default, aPostStream,
+                            mozilla::net::RP_Unset, aPostStream,
                             aHeaderStream, nullptr);
 }
 
@@ -5363,7 +5363,7 @@ nsDocShell::LoadErrorPage(nsIURI* aURI, const char16_t* aURL,
   NS_ENSURE_SUCCESS(rv, rv);
 
   return InternalLoad(errorPageURI, nullptr, false, nullptr,
-                      mozilla::net::RP_Default,
+                      mozilla::net::RP_Unset,
                       nsContentUtils::GetSystemPrincipal(), nullptr,
                       INTERNAL_LOAD_FLAGS_NONE, EmptyString(),
                       nullptr, NullString(), nullptr, nullptr, LOAD_ERROR_PAGE,
@@ -12230,7 +12230,7 @@ nsDocShell::AddToSessionHistory(nsIURI* aURI, nsIChannel* aChannel,
   nsCOMPtr<nsIURI> originalURI;
   bool loadReplace = false;
   nsCOMPtr<nsIURI> referrerURI;
-  uint32_t referrerPolicy = mozilla::net::RP_Default;
+  uint32_t referrerPolicy = mozilla::net::RP_Unset;
   nsCOMPtr<nsISupports> cacheKey;
   nsCOMPtr<nsIPrincipal> triggeringPrincipal = aTriggeringPrincipal;
   nsCOMPtr<nsIPrincipal> principalToInherit = aPrincipalToInherit;

docshell/base/nsDocShellLoadInfo.cpp

@@ -16,7 +16,7 @@ nsDocShellLoadInfo::nsDocShellLoadInfo()
   , mInheritPrincipal(false)
   , mPrincipalIsExplicit(false)
   , mSendReferrer(true)
-  , mReferrerPolicy(mozilla::net::RP_Default)
+  , mReferrerPolicy(mozilla::net::RP_Unset)
   , mLoadType(nsIDocShellLoadInfo::loadNormal)
   , mIsSrcdocLoad(false)
 {

docshell/base/nsIWebNavigation.idl

@@ -264,7 +264,7 @@ interface nsIWebNavigation : nsISupports
    *        URI will be inferred internally.
    * @param aReferrerPolicy
    *        One of the REFERRER_POLICY_* constants from nsIHttpChannel.
-   *        Normal case is REFERRER_POLICY_DEFAULT.
+   *        Normal case is REFERRER_POLICY_NO_REFERRER_WHEN_DOWNGRADE.
    * @param aPostData
    *        If the URI corresponds to a HTTP request, then this stream is
    *        appended directly to the HTTP request headers.  It may be prefixed

docshell/shistory/nsSHEntry.cpp

@@ -24,7 +24,7 @@ static uint32_t gEntryID = 0;
 nsSHEntry::nsSHEntry()
   : mShared(new nsSHEntryShared())
   , mLoadReplace(false)
-  , mReferrerPolicy(mozilla::net::RP_Default)
+  , mReferrerPolicy(mozilla::net::RP_Unset)
   , mLoadType(0)
   , mID(gEntryID++)
   , mScrollPositionX(0)

docshell/test/browser/browser_grouped_shistory_bfcache_cleaning.js

@@ -23,7 +23,7 @@ add_task(function* () {
   yield BrowserTestUtils.withNewTab({ gBrowser, url: "data:text/html,a" }, function* (browser1) {
     // Set up the grouped SHEntry setup
     let tab2 = gBrowser.loadOneTab("data:text/html,b", {
-      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
       allowThirdPartyFixup: true,
       relatedToCurrent: true,
       isPrerendered: true,

docshell/test/browser/browser_grouped_shistory_crossproc.js

@@ -28,7 +28,7 @@ add_task(function* () {
   yield BrowserTestUtils.withNewTab({ gBrowser, url: "data:text/html,a" }, function* (browser1) {
     // Set up the grouped SHEntry setup
     let tab2 = gBrowser.loadOneTab("data:text/html,b", {
-      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
       allowThirdPartyFixup: true,
       relatedToCurrent: true,
       isPrerendered: true,

docshell/test/browser/browser_grouped_shistory_dead_navigate.js

@@ -17,7 +17,7 @@ add_task(function* () {
   yield BrowserTestUtils.withNewTab({ gBrowser, url: "data:text/html,a" }, function* (browser1) {
     // Set up the grouped SHEntry setup
     let tab2 = gBrowser.loadOneTab("data:text/html,b", {
-      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      referrerPolicy: Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
       allowThirdPartyFixup: true,
       relatedToCurrent: true,
       isPrerendered: true,

dom/base/Location.cpp

@@ -109,7 +109,7 @@ Location::CheckURL(nsIURI* aURI, nsIDocShellLoadInfo** aLoadInfo)
 
   nsCOMPtr<nsIPrincipal> triggeringPrincipal;
   nsCOMPtr<nsIURI> sourceURI;
-  net::ReferrerPolicy referrerPolicy = net::RP_Default;
+  net::ReferrerPolicy referrerPolicy = net::RP_Unset;
 
   if (JSContext *cx = nsContentUtils::GetCurrentJSContext()) {
     // No cx means that there's no JS running, or at least no JS that

dom/base/nsContentAreaDragDrop.cpp

@@ -165,7 +165,7 @@ nsContentAreaDragDropDataProvider::SaveURIToFile(nsAString& inSourceURIString,
 
   // referrer policy can be anything since the referrer is nullptr
   return persist->SavePrivacyAwareURI(sourceURI, nullptr, nullptr,
-                                      mozilla::net::RP_Default,
+                                      mozilla::net::RP_Unset,
                                       nullptr, nullptr,
                                       inDestFile, isPrivate);
 }

dom/base/nsContentUtils.cpp

@@ -8514,9 +8514,7 @@ nsContentUtils::SetFetchReferrerURIWithPolicy(nsIPrincipal* aPrincipal,
     referrerURI = principalURI;
   }
 
-  net::ReferrerPolicy referrerPolicy = (aReferrerPolicy != net::RP_Unset) ?
+  return aChannel->SetReferrerWithPolicy(referrerURI, aReferrerPolicy);
-                                       aReferrerPolicy : net::RP_Default;
-  return aChannel->SetReferrerWithPolicy(referrerURI, referrerPolicy);
 }
 
 // static
@@ -8530,6 +8528,9 @@ nsContentUtils::GetReferrerPolicyFromHeader(const nsAString& aHeader)
   net::ReferrerPolicy referrerPolicy = mozilla::net::RP_Unset;
   while (tokenizer.hasMoreTokens()) {
     token = tokenizer.nextToken();
+    if (token.IsEmpty()) {
+      continue;
+    }
     net::ReferrerPolicy policy = net::ReferrerPolicyFromString(token);
     if (policy != net::RP_Unset) {
       referrerPolicy = policy;

dom/base/nsDocument.cpp

@@ -1279,7 +1279,7 @@ static already_AddRefed<mozilla::dom::NodeInfo> nullNodeInfo;
 nsIDocument::nsIDocument()
   : nsINode(nullNodeInfo),
     mReferrerPolicySet(false),
-    mReferrerPolicy(mozilla::net::RP_Default),
+    mReferrerPolicy(mozilla::net::RP_Unset),
     mBlockAllMixedContent(false),
     mBlockAllMixedContentPreloads(false),
     mUpgradeInsecureRequests(false),
@@ -2468,7 +2468,7 @@ nsDocument::ApplySettingsFromCSP(bool aSpeculative)
     if (csp) {
       // Set up any Referrer Policy specified by CSP
       bool hasReferrerPolicy = false;
-      uint32_t referrerPolicy = mozilla::net::RP_Default;
+      uint32_t referrerPolicy = mozilla::net::RP_Unset;
       rv = csp->GetReferrerPolicy(&referrerPolicy, &hasReferrerPolicy);
       NS_ENSURE_SUCCESS_VOID(rv);
       if (hasReferrerPolicy) {

dom/base/nsScriptLoader.h

@@ -91,7 +91,7 @@ public:
       mLineNo(1),
       mCORSMode(aCORSMode),
       mIntegrity(aIntegrity),
-      mReferrerPolicy(mozilla::net::RP_Default)
+      mReferrerPolicy(mozilla::net::RP_Unset)
   {
   }
 

dom/plugins/base/nsPluginHost.cpp

@@ -3304,7 +3304,7 @@ nsresult nsPluginHost::NewPluginURLStream(const nsString& aURL,
       // errors about malformed requests if we include it in POSTs. See
       // bug 724465.
       nsCOMPtr<nsIURI> referer;
-      net::ReferrerPolicy referrerPolicy = net::RP_Default;
+      net::ReferrerPolicy referrerPolicy = net::RP_Unset;
 
       nsCOMPtr<nsIObjectLoadingContent> olc = do_QueryInterface(element);
       if (olc)

dom/security/nsCSPContext.cpp

@@ -346,9 +346,9 @@ NS_IMETHODIMP
 nsCSPContext::GetReferrerPolicy(uint32_t* outPolicy, bool* outIsSet)
 {
   *outIsSet = false;
-  *outPolicy = mozilla::net::RP_Default;
+  *outPolicy = mozilla::net::RP_Unset;
   nsAutoString refpol;
-  mozilla::net::ReferrerPolicy previousPolicy = mozilla::net::RP_Default;
+  mozilla::net::ReferrerPolicy previousPolicy = mozilla::net::RP_Unset;
   for (uint32_t i = 0; i < mPolicies.Length(); i++) {
     mPolicies[i]->getReferrerPolicy(refpol);
     // only set the referrer policy if not delievered through a CSPRO and

dom/xhr/XMLHttpRequestMainThread.cpp

@@ -2603,7 +2603,7 @@ XMLHttpRequestMainThread::InitiateFetch(nsIInputStream* aUploadStream,
       nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner();
       nsCOMPtr<nsIDocument> doc = owner ? owner->GetExtantDoc() : nullptr;
       mozilla::net::ReferrerPolicy referrerPolicy = doc ?
-        doc->GetReferrerPolicy() : mozilla::net::RP_Default;
+        doc->GetReferrerPolicy() : mozilla::net::RP_Unset;
       nsContentUtils::SetFetchReferrerURIWithPolicy(mPrincipal, doc,
                                                     httpChannel, referrerPolicy);
     }

dom/xml/nsXMLPrettyPrinter.cpp

@@ -105,7 +105,7 @@ nsXMLPrettyPrinter::PrettyPrint(nsIDocument* aDocument,
     rv = nsSyncLoadService::LoadDocument(xslUri, nsIContentPolicy::TYPE_XSLT,
                                          nsContentUtils::GetSystemPrincipal(),
                                          nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
-                                         nullptr, true, mozilla::net::RP_Default,
+                                         nullptr, true, mozilla::net::RP_Unset,
                                          getter_AddRefs(xslDocument));
     NS_ENSURE_SUCCESS(rv, rv);
 

dom/xslt/xslt/txMozillaXSLTProcessor.cpp

@@ -1037,7 +1037,7 @@ NS_IMETHODIMP
 txMozillaXSLTProcessor::LoadStyleSheet(nsIURI* aUri,
                                        nsIDocument* aLoaderDocument)
 {
-    mozilla::net::ReferrerPolicy refpol = mozilla::net::RP_Default;
+    mozilla::net::ReferrerPolicy refpol = mozilla::net::RP_Unset;
     if (mStylesheetDocument) {
         refpol = mStylesheetDocument->GetReferrerPolicy();
     }

dom/xslt/xslt/txStylesheetCompiler.cpp

@@ -1069,7 +1069,7 @@ TX_XSLTFunctionAvailable(nsIAtom* aName, int32_t aNameSpaceID)
 {
     RefPtr<txStylesheetCompiler> compiler =
         new txStylesheetCompiler(EmptyString(),
-                                 mozilla::net::RP_Default, nullptr);
+                                 mozilla::net::RP_Unset, nullptr);
     NS_ENSURE_TRUE(compiler, false);
 
     nsAutoPtr<FunctionCall> fnCall;

embedding/components/webbrowserpersist/nsWebBrowserPersist.cpp

@@ -630,7 +630,7 @@ nsWebBrowserPersist::SerializeNextFile()
             // The Referrer Policy doesn't matter here since the referrer is
             // nullptr.
             rv = SaveURIInternal(uri, nullptr, nullptr,
-                                 mozilla::net::RP_Default, nullptr, nullptr,
+                                 mozilla::net::RP_Unset, nullptr, nullptr,
                                  fileAsURI, true, mIsPrivate);
             // If SaveURIInternal fails, then it will have called EndDownload,
             // which means that |data| is no longer valid memory. We MUST bail.

image/imgLoader.cpp

@@ -2009,8 +2009,7 @@ imgLoader::LoadImageXPCOM(nsIURI* aURI,
     nsresult rv = LoadImage(aURI,
                             aInitialDocumentURI,
                             aReferrerURI,
-                            refpol == mozilla::net::RP_Unset ?
+                            refpol,
-                              mozilla::net::RP_Default : refpol,
                             aLoadingPrincipal,
                             aLoadGroup,
                             aObserver,
@@ -2365,7 +2364,7 @@ imgLoader::LoadImageWithChannel(nsIChannel* channel,
         ? loadInfo->InternalContentPolicyType()
         : nsIContentPolicy::TYPE_INTERNAL_IMAGE;
 
-      if (ValidateEntry(entry, uri, nullptr, nullptr, RP_Default,
+      if (ValidateEntry(entry, uri, nullptr, nullptr, RP_Unset,
                         nullptr, aObserver, aCX, requestFlags,
                         policyType, false, nullptr,
                         nullptr, imgIRequest::CORS_NONE)) {
@@ -2454,7 +2453,7 @@ imgLoader::LoadImageWithChannel(nsIChannel* channel,
     // can set aHadInsecureRedirect to false here.
     rv = request->Init(originalURI, uri, /* aHadInsecureRedirect = */ false,
                        channel, channel, entry, aCX, nullptr,
-                       imgIRequest::CORS_NONE, RP_Default);
+                       imgIRequest::CORS_NONE, RP_Unset);
     NS_ENSURE_SUCCESS(rv, rv);
 
     RefPtr<ProxyListener> pl =

image/imgRequest.cpp

@@ -57,7 +57,7 @@ imgRequest::imgRequest(imgLoader* aLoader, const ImageCacheKey& aCacheKey)
  , mValidator(nullptr)
  , mInnerWindowId(0)
  , mCORSMode(imgIRequest::CORS_NONE)
- , mReferrerPolicy(mozilla::net::RP_Default)
+ , mReferrerPolicy(mozilla::net::RP_Unset)
  , mImageErrorCode(NS_OK)
  , mMutex("imgRequest")
  , mProgressTracker(new ProgressTracker())

layout/generic/nsImageFrame.cpp

@@ -2210,7 +2210,7 @@ nsImageFrame::LoadIcon(const nsAString& aSpec,
                                        relevant for cookies, so does not
                                        apply to icons. */
                        nullptr,      /* referrer (not relevant for icons) */
-                       mozilla::net::RP_Default,
+                       mozilla::net::RP_Unset,
                        nullptr,      /* principal (not relevant for icons) */
                        loadGroup,
                        gIconLoad,

layout/style/Loader.h

@@ -372,7 +372,7 @@ public:
                      const nsCString& aCharset,
                      nsICSSLoaderObserver* aObserver,
                      CORSMode aCORSMode = CORS_NONE,
-                     ReferrerPolicy aReferrerPolicy = mozilla::net::RP_Default,
+                     ReferrerPolicy aReferrerPolicy = mozilla::net::RP_Unset,
                      const nsAString& aIntegrity = EmptyString());
 
   /**
@@ -500,7 +500,7 @@ private:
                                         RefPtr<StyleSheet>* aSheet,
                                         nsICSSLoaderObserver* aObserver,
                                         CORSMode aCORSMode = CORS_NONE,
-                                        ReferrerPolicy aReferrerPolicy = mozilla::net::RP_Default,
+                                        ReferrerPolicy aReferrerPolicy = mozilla::net::RP_Unset,
                                         const nsAString& aIntegrity = EmptyString());
 
   // Post a load event for aObserver to be notified about aSheet.  The

layout/style/nsLayoutStylesheetCache.cpp

@@ -869,10 +869,10 @@ nsLayoutStylesheetCache::BuildPreferenceSheet(RefPtr<StyleSheet>* aSheet,
 {
   if (mBackendType == StyleBackendType::Gecko) {
     *aSheet = new CSSStyleSheet(eAgentSheetFeatures, CORS_NONE,
-                                mozilla::net::RP_Default);
+                                mozilla::net::RP_Unset);
   } else {
     *aSheet = new ServoStyleSheet(eAgentSheetFeatures, CORS_NONE,
-                                  mozilla::net::RP_Default, dom::SRIMetadata());
+                                  mozilla::net::RP_Unset, dom::SRIMetadata());
   }
 
   StyleSheet* sheet = *aSheet;

parser/html/nsHtml5TreeOpExecutor.cpp

@@ -66,7 +66,7 @@ static nsITimer* gFlushTimer = nullptr;
 nsHtml5TreeOpExecutor::nsHtml5TreeOpExecutor()
   : nsHtml5DocumentBuilder(false)
   , mPreloadedURLs(23)  // Mean # of preloadable resources per page on dmoz
-  , mSpeculationReferrerPolicy(mozilla::net::RP_Default)
+  , mSpeculationReferrerPolicy(mozilla::net::RP_Unset)
 {
   // zeroing operator new for everything else
 }
@@ -1058,7 +1058,7 @@ nsHtml5TreeOpExecutor::AddSpeculationCSP(const nsAString& aCSP)
 
   // Record "speculated" referrer policy for preloads
   bool hasReferrerPolicy = false;
-  uint32_t referrerPolicy = mozilla::net::RP_Default;
+  uint32_t referrerPolicy = mozilla::net::RP_Unset;
   rv = preloadCsp->GetReferrerPolicy(&referrerPolicy, &hasReferrerPolicy);
   NS_ENSURE_SUCCESS_VOID(rv);
   if (hasReferrerPolicy) {

toolkit/components/downloads/nsDownloadManager.cpp

@@ -1871,7 +1871,7 @@ nsDownloadManager::RetryDownload(nsDownload* dl)
 
   // referrer policy can be anything since referrer is nullptr
   rv = wbp->SavePrivacyAwareURI(dl->mSource, nullptr,
-                                nullptr, mozilla::net::RP_Default,
+                                nullptr, mozilla::net::RP_Unset,
                                 nullptr, nullptr,
                                 dl->mTarget, dl->mPrivate);
   if (NS_FAILED(rv)) {

toolkit/components/remotebrowserutils/RemoteWebNavigation.js

@@ -69,7 +69,7 @@ RemoteWebNavigation.prototype = {
   },
   loadURI(aURI, aLoadFlags, aReferrer, aPostData, aHeaders) {
     this.loadURIWithOptions(aURI, aLoadFlags, aReferrer,
-                            Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+                            Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
                             aPostData, aHeaders, null);
   },
   loadURIWithOptions(aURI, aLoadFlags, aReferrer, aReferrerPolicy,

toolkit/components/viewsource/content/viewSource-content.js

@@ -391,7 +391,7 @@ var ViewSourceContent = {
         docShell.QueryInterface(Ci.nsIWebNavigation)
                 .loadURIWithOptions(content.location.href,
                                     Ci.nsIWebNavigation.LOAD_FLAGS_BYPASS_CLASSIFIER,
-                                    null, Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+                                    null, Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
                                     null, null, null);
       }
     }
@@ -770,7 +770,7 @@ var ViewSourceContent = {
 
     // all our content is held by the data:URI and URIs are internally stored as utf-8 (see nsIURI.idl)
     let loadFlags = Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
-    let referrerPolicy = Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT;
+    let referrerPolicy = Ci.nsIHttpChannel.REFERRER_POLICY_UNSET;
     let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
     webNav.loadURIWithOptions(uri, loadFlags,
                               null, referrerPolicy,  // referrer

toolkit/content/contentAreaUtils.js

@@ -559,7 +559,7 @@ function internalPersist(persistArgs) {
     persist.savePrivacyAwareURI(persistArgs.sourceURI,
                                 persistArgs.sourceCacheKey,
                                 persistArgs.sourceReferrer,
-                                Components.interfaces.nsIHttpChannel.REFERRER_POLICY_NO_REFERRER_WHEN_DOWNGRADE,
+                                Components.interfaces.nsIHttpChannel.REFERRER_POLICY_UNSET,
                                 persistArgs.sourcePostData,
                                 null,
                                 targetFileURL,

toolkit/content/widgets/browser.xml

@@ -133,7 +133,7 @@
             if (!aURI)
               aURI = "about:blank";
 
-            var aReferrerPolicy = Components.interfaces.nsIHttpChannel.REFERRER_POLICY_DEFAULT;
+            var aReferrerPolicy = Components.interfaces.nsIHttpChannel.REFERRER_POLICY_UNSET;
 
             // Check for loadURIWithFlags(uri, { ... });
             var params = arguments[1];

toolkit/mozapps/extensions/LightweightThemeManager.jsm

@@ -868,7 +868,7 @@ function _persistImage(sourceURL, localFileName, successCallback) {
   persist.progressListener = new _persistProgressListener(successCallback);
 
   persist.saveURI(sourceURI, null,
-                  null, Ci.nsIHttpChannel.REFERRER_POLICY_NO_REFERRER_WHEN_DOWNGRADE,
+                  null, Ci.nsIHttpChannel.REFERRER_POLICY_UNSET,
                   null, null, targetURI, null);
 }
 

widget/cocoa/nsMenuItemIconX.mm

@@ -310,7 +310,7 @@ nsMenuItemIconX::LoadIcon(nsIURI* aIconURI)
   }
 
   nsresult rv = loader->LoadImage(aIconURI, nullptr, nullptr,
-                                  mozilla::net::RP_Default,
+                                  mozilla::net::RP_Unset,
                                   nullptr, loadGroup, this,
                                   nullptr, nullptr, nsIRequest::LOAD_NORMAL, nullptr,
                                   nsIContentPolicy::TYPE_INTERNAL_IMAGE, EmptyString(),