diff --git a/src/js/messaging.js b/src/js/messaging.js
index 654c71f28..be1a23ff9 100644
--- a/src/js/messaging.js
+++ b/src/js/messaging.js
@@ -309,6 +309,17 @@ var popupDataFromTabId = function(tabId, tabTitle) {
 
     var pageStore = µb.pageStoreFromTabId(tabId);
     if ( pageStore ) {
+        // https://github.com/gorhill/uBlock/issues/2105
+        //   Be sure to always include the current page's hostname -- it might
+        //   not be present when the page itself is pulled from the browser's
+        //   short-term memory cache. This needs to be done before calling
+        //   getHostnameDict().
+        if (
+            pageStore.hostnameToCountMap.has(rootHostname) === false &&
+            µb.URI.isNetworkURI(tabContext.rawURL)
+        ) {
+            pageStore.hostnameToCountMap.set(rootHostname, 0);
+        }
         r.pageBlockedRequestCount = pageStore.perLoadBlockedRequestCount;
         r.pageAllowedRequestCount = pageStore.perLoadAllowedRequestCount;
         r.netFilteringSwitch = pageStore.getNetFilteringSwitch();
diff --git a/src/js/uritools.js b/src/js/uritools.js
index 9bd1271a8..661d6c608 100644
--- a/src/js/uritools.js
+++ b/src/js/uritools.js
@@ -21,6 +21,8 @@
 
 /* global publicSuffixList */
 
+'use strict';
+
 /*******************************************************************************
 
 RFC 3986 as reference: http://tools.ietf.org/html/rfc3986#appendix-A
@@ -33,8 +35,6 @@ Naming convention from https://en.wikipedia.org/wiki/URI_scheme#Examples
 
 µBlock.URI = (function() {
 
-'use strict';
-
 /******************************************************************************/
 
 // Favorite regex tool: http://regex101.com/
@@ -402,6 +402,18 @@ URI.domainFromURI = function(uri) {
 
 /******************************************************************************/
 
+URI.isNetworkURI = function(uri) {
+    return /^(?:ftps?|https?|wss?):\/\//.test(uri);
+};
+
+/******************************************************************************/
+
+URI.isNetworkScheme = function(scheme) {
+    return /^(?:ftps?|https?|wss?)$/.test(scheme);
+};
+
+/******************************************************************************/
+
 // Normalize the way µBlock expects it
 
 URI.normalizedURI = function() {