this fixes #503

src/css/devtool-log.css

@@ -49,6 +49,9 @@ body[dir="rtl"] #content {
 #content table tr.allowed {
     background-color: rgba(0, 160, 0, 0.1)
     }
+#content table tr.allowed.mirrored {
+    background-color: rgba(255, 255, 0, 0.3)
+    }
 #content table tr.maindoc {
     background-color: #eee;
     }

src/js/devtool-log.js

@@ -98,6 +98,9 @@ var renderLogEntry = function(entry) {
         tr.classList.add('blocked');
     } else if ( entry.result.charAt(1) === 'a' ) {
         tr.classList.add('allowed');
+        if ( entry.result.charAt(0) === 'm' ) {
+            tr.classList.add('mirrored');
+        }
     }
     if ( entry.type === 'main_frame' ) {
         tr.classList.add('maindoc');

src/js/pagestore.js

@@ -684,6 +684,22 @@ PageStore.prototype.boolFromResult = function(result) {
 
 /******************************************************************************/
 
+PageStore.prototype.toMirrorURL = function(requestURL) {
+    // https://github.com/gorhill/uBlock/issues/351
+    // Bypass experimental features when uBlock is disabled for a site
+    if ( µb.userSettings.experimentalEnabled === false ||
+         this.getNetFilteringSwitch() === false ||
+         this.skipLocalMirroring ) {
+        return '';
+    }
+
+    // https://code.google.com/p/chromium/issues/detail?id=387198
+    // Not all redirects will succeed, until bug above is fixed.
+    return µb.mirrors.toURL(requestURL, true);
+};
+
+/******************************************************************************/
+
 PageStore.prototype.updateBadge = function() {
     var netFiltering = this.getNetFilteringSwitch();
     var badge = '';

src/js/traffic.js

@@ -104,11 +104,10 @@ var onBeforeRequest = function(details) {
 
     var result = pageStore.filterRequest(requestContext);
 
-    // Log result
+    // Possible outcomes: blocked, allowed-passthru, allowed-mirror
-    pageStore.logBuffer.writeOne(requestContext, result);
 
     // Not blocked
-    if ( pageStore.boolFromResult(result) === false ) {
+    if ( µb.isAllowResult(result) ) {
         //console.debug('onBeforeRequest()> ALLOW "%s" (%o) because "%s"', details.url, details, result);
 
         pageStore.perLoadAllowedRequestCount++;
@@ -119,34 +118,26 @@ var onBeforeRequest = function(details) {
             pageStore.addFrame(frameId, requestURL);
         }
 
-        // https://github.com/gorhill/uBlock/issues/351
-        // Bypass experimental features when uBlock is disabled for a site
-        if ( !pageStore.getNetFilteringSwitch() ) {
-            return;
-        }
-
-        if ( !µb.userSettings.experimentalEnabled ) {
-            return;
-        }
-
-        if ( pageStore.skipLocalMirroring ) {
-            return;
-        }
-
         // https://code.google.com/p/chromium/issues/detail?id=387198
         // Not all redirects will succeed, until bug above is fixed.
-        var redirectURL = µb.mirrors.toURL(requestURL, true);
+        var redirectURL = pageStore.toMirrorURL(requestURL);
         if ( redirectURL !== '' ) {
+            pageStore.logBuffer.writeOne(requestContext, 'ma:');
+
             //console.debug('"%s" redirected to "%s..."', requestURL.slice(0, 50), redirectURL.slice(0, 50));
             return { redirectUrl: redirectURL };
         }
 
+        pageStore.logBuffer.writeOne(requestContext, result);
+
         return;
     }
 
     // Blocked
     //console.debug('onBeforeRequest()> BLOCK "%s" (%o) because "%s"', details.url, details, result);
 
+    pageStore.logBuffer.writeOne(requestContext, result);
+
     pageStore.perLoadBlockedRequestCount++;
     µb.localSettings.blockedRequestCount++;
     µb.updateBadgeAsync(tabId);
@@ -222,8 +213,7 @@ var onBeforeSendHeaders = function(details) {
     var referrerHostname = µburi.hostnameFromURI(referrer);
     var pageDetails = {
         pageHostname: referrerHostname,
-        pageDomain: µburi.domainFromHostname(referrerHostname),
+        pageDomain: µburi.domainFromHostname(referrerHostname)
-        firstParty: false
     };
     pageDetails.rootHostname = pageDetails.pageHostname;
     pageDetails.rootDomain = pageDetails.pageDomain;