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diff --git a/src/js/tab.js b/src/js/tab.js
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+/*******************************************************************************
+
+    µBlock - a Chromium browser extension to block requests.
+    Copyright (C) 2014 Raymond Hill
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see {http://www.gnu.org/licenses/}.
+
+    Home: https://github.com/gorhill/uBlock
+*/
+
+/* global µBlock */
+
+/******************************************************************************/
+
+// When the DOM content of root frame is loaded, this means the tab
+// content has changed.
+vAPI.tabs.onNavigation = function(details) {
+    if ( details.frameId !== 0 ) {
+        return;
+    }
+    µBlock.bindTabToPageStats(details.tabId, details.url);
+};
+
+// 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.
+vAPI.tabs.onUpdated = function(tabId, changeInfo, tab) {
+    if ( !tab.url || tab.url === '' ) {
+        return;
+    }
+    if ( !changeInfo.url ) {
+        return;
+    }
+    µBlock.bindTabToPageStats(tabId, changeInfo.url, 'tabUpdated');
+};
+
+vAPI.tabs.onClosed = function(tabId) {
+    if ( tabId < 0 ) {
+        return;
+    }
+    µBlock.unbindTabFromPageStats(tabId);
+};
+
+// https://github.com/gorhill/uBlock/issues/297
+vAPI.tabs.onPopup = function(details) {
+    var pageStore = µBlock.pageStoreFromTabId(details.sourceTabId);
+    if ( !pageStore ) {
+        return;
+    }
+    var requestURL = details.url;
+    var result = '';
+
+    // https://github.com/gorhill/uBlock/issues/323
+    // If popup URL is whitelisted, do not block it
+    if ( µBlock.getNetFilteringSwitch(requestURL) ) {
+        result = µBlock.netFilteringEngine.matchStringExactType(pageStore, requestURL, 'popup');
+    }
+
+    // https://github.com/gorhill/uBlock/issues/91
+        if ( result !== '' ) {
+            pageStore.recordResult('popup', requestURL, result);
+        }
+
+    // Not blocked
+    if ( pageStore.boolFromResult(result) === false ) {
+        return;
+    }
+
+    // Blocked
+    // It is a popup, block and remove the tab.
+    µBlock.unbindTabFromPageStats(details.tabId);
+    µBlock.XAL.destroyTab(details.tabId);
+};
+
+vAPI.tabs.registerListeners();
+
+
+/******************************************************************************/
+/******************************************************************************/
+
+// https://github.com/gorhill/httpswitchboard/issues/303
+// Some kind of trick going on here:
+//   Any scheme other than 'http' and 'https' is remapped into a fake
+//   URL which trick the rest of µBlock into being able to process an
+//   otherwise unmanageable scheme. µBlock needs web page to have a proper
+//   hostname to work properly, so just like the 'chromium-behind-the-scene'
+//   fake domain name, we map unknown schemes into a fake '{scheme}-scheme'
+//   hostname. This way, for a specific scheme you can create scope with
+//   rules which will apply only to that scheme.
+
+µBlock.normalizePageURL = function(pageURL) {
+    var uri = this.URI.set(pageURL);
+    if ( uri.scheme === 'https' || uri.scheme === 'http' ) {
+        return uri.normalizedURI();
+    }
+    return '';
+};
+
+/******************************************************************************/
+
+// Create an entry for the tab if it doesn't exist.
+
+µBlock.bindTabToPageStats = function(tabId, pageURL, context) {
+    this.updateBadgeAsync(tabId);
+
+    // https://github.com/gorhill/httpswitchboard/issues/303
+    // Normalize page URL
+    pageURL = this.normalizePageURL(pageURL);
+
+    // Do not create a page store for URLs which are of no interests
+    if ( pageURL === '' ) {
+        this.unbindTabFromPageStats(tabId);
+        return null;
+    }
+
+    // Reuse page store if one exists: this allows to guess if a tab is
+    // a popup.
+    var pageStore = this.pageStores[tabId];
+
+    if ( pageStore ) {
+        if ( pageURL !== pageStore.pageURL || context === 'beforeRequest' ) {
+            pageStore.reuse(pageURL, context);
+        }
+    } else {
+        pageStore = this.pageStores[tabId] = this.PageStore.factory(tabId, pageURL);
+    }
+
+    return pageStore;
+};
+
+µBlock.unbindTabFromPageStats = function(tabId) {
+    //console.debug('µBlock> unbindTabFromPageStats(%d)', tabId);
+    var pageStore = this.pageStores[tabId];
+    if ( pageStore !== undefined ) {
+        pageStore.dispose();
+        delete this.pageStores[tabId];
+    }
+};
+
+/******************************************************************************/
+
+µBlock.pageUrlFromTabId = function(tabId) {
+    var pageStore = this.pageStores[tabId];
+    return pageStore ? pageStore.pageURL : '';
+};
+
+µBlock.pageUrlFromPageStats = function(pageStats) {
+    if ( pageStats ) {
+        return pageStats.pageURL;
+    }
+    return '';
+};
+
+µBlock.pageStoreFromTabId = function(tabId) {
+    return this.pageStores[tabId];
+};
+
+/******************************************************************************/
+
+// µBlock.forceReload = function(pageURL) {
+//     var tabId = this.tabIdFromPageUrl(pageURL);
+//     if ( tabId ) {
+//         chrome.tabs.reload(tabId, { bypassCache: true });
+//     }
+// };