this fixes #297 and #91

js/tab.js

@@ -28,18 +28,18 @@
 
     // When the DOM content of root frame is loaded, this means the tab
     // content has changed.
-    function onNavigationCommitted(details) {
+    var onNavigationCommitted = function(details) {
         if ( details.frameId !== 0 ) {
             return;
         }
         µb.bindTabToPageStats(details.tabId, details.url);
-    }
+    };
     chrome.webNavigation.onCommitted.addListener(onNavigationCommitted);
 
     // It may happen the URL in the tab changes, while the page's document
     // stays the same (for instance, Google Maps). Without this listener,
     // the extension icon won't be properly refreshed.
-    function onTabUpdated(tabId, changeInfo, tab) {
+    var onTabUpdated = function(tabId, changeInfo, tab) {
         if ( !tab.url || tab.url === '' ) {
             return;
         }
@@ -47,16 +47,40 @@
             return;
         }
         µb.bindTabToPageStats(tabId, changeInfo.url, 'tabUpdated');
-    }
+    };
     chrome.tabs.onUpdated.addListener(onTabUpdated);
 
-    function onTabRemoved(tabId) {
+    var onTabRemoved = function(tabId) {
         if ( tabId < 0 ) {
             return;
         }
         µb.unbindTabFromPageStats(tabId);
-    }
+    };
     chrome.tabs.onRemoved.addListener(onTabRemoved);
+
+    // https://github.com/gorhill/uBlock/issues/297
+    var onCreatedNavigationTarget = function(details) {
+        var pageStore = µb.pageStoreFromTabId(details.sourceTabId);
+        if ( !pageStore ) {
+            return;
+        }
+        if ( pageStore.getNetFilteringSwitch() !== true ) {
+            return;
+        }
+        var requestURL = details.url;
+        var result = µb.netFilteringEngine.matchStringExactType(pageStore, requestURL, 'popup');
+        // https://github.com/gorhill/uBlock/issues/91
+        pageStore.recordResult('popup', requestURL, result);
+        // Not blocked
+        if ( pageStore.boolFromResult(result) === false ) {
+            return;
+        }
+        // Blocked
+        // It is a popup, block and remove the tab.
+        µb.unbindTabFromPageStats(details.tabId);
+        µb.XAL.destroyTab(details.tabId);
+    };
+    chrome.webNavigation.onCreatedNavigationTarget.addListener(onCreatedNavigationTarget);
 })();
 
 /******************************************************************************/

js/traffic.js

@@ -154,7 +154,7 @@ var onBeforeSendHeaders = function(details) {
     // Lookup the page store associated with this tab id.
     var pageStore = µb.pageStoreFromTabId(tabId);
     if ( !pageStore ) {
-        console.error('µBlock> onBeforeSendHeaders(): no page store for "%s"', requestURL);
+        // This happens under normal circumstances in Opera.
         return;
     }
 
@@ -201,7 +201,7 @@ var onBeforeSendHeaders = function(details) {
 
     // It is a popup, block and remove the tab.
     µb.unbindTabFromPageStats(tabId);
-    chrome.tabs.remove(tabId);
+    µb.XAL.destroyTab(tabId);
 
     return { 'cancel': true };
 };

js/xal.js

@@ -86,6 +86,16 @@ exports.restart = function() {
 
 /******************************************************************************/
 
+exports.destroyTab = function(tabId) {
+    chrome.tabs.remove(tabId, function() {
+        // required by chrome API, or else warnings at console (also, mind jshint)
+        if ( chrome.runtime.lastError ) {
+        }
+    });
+};
+
+/******************************************************************************/
+
 return exports;
 
 /******************************************************************************/