diff --git a/js/traffic.js b/js/traffic.js
index 36e9dbcc4..357501086 100644
--- a/js/traffic.js
+++ b/js/traffic.js
@@ -182,23 +182,25 @@ var onBeforeSendHeaders = function(details) {
         return;
     }
 
-    // https://github.com/gorhill/uBlock/issues/67
-    // We need to pass the details of the page which opened this popup,
-    // so that the `third-party` option works.
-    var µburi = µb.URI;
-    var referrerHostname = µburi.hostnameFromURI(referrer);
-    var pageDetails = {
-        pageHostname: referrerHostname,
-        pageDomain: µburi.domainFromHostname(referrerHostname)
-    };
-    //console.debug('Referrer="%s"', referrer);
-
     // TODO: I think I should test the switch of the referrer instead, not the
     // switch of the popup. If so, that would require being able to lookup
     // a page store from a URL. Have to keep in mind the same URL can appear
     // in multiple tabs.
     var result = '';
     if ( pageStore.getNetFilteringSwitch() ) {
+        // https://github.com/gorhill/uBlock/issues/67
+        // We need to pass the details of the page which opened this popup,
+        // so that the `third-party` option works.
+        // Create a synthetic context based on the referrer.
+        var µburi = µb.URI;
+        var referrerHostname = µburi.hostnameFromURI(referrer);
+        var pageDetails = {
+            pageHostname: referrerHostname,
+            pageDomain: µburi.domainFromHostname(referrerHostname),
+        };
+        pageDetails.rootHostname = pageDetails.pageHostname;
+        pageDetails.rootDomain = pageDetails.pageDomain;
+        //console.debug('Referrer="%s"', referrer);
         result = µb.netFilteringEngine.matchStringExactType(pageDetails, requestURL, 'popup');
     }