diff --git a/src/js/document-blocked.js b/src/js/document-blocked.js
index 93e2808ca..969017ac4 100644
--- a/src/js/document-blocked.js
+++ b/src/js/document-blocked.js
@@ -73,7 +73,7 @@ var proceedPermanent = function() {
         what: 'toggleHostnameSwitch',
         name: 'noStrictBlocking',
         hostname: getTargetHostname(),
-        fromHostname: details.hn,
+        deep: true,
         state: true
     }, proceedToURL);
 };
diff --git a/src/js/hnswitches.js b/src/js/hnswitches.js
index 27a82bc59..1ca46b3c5 100644
--- a/src/js/hnswitches.js
+++ b/src/js/hnswitches.js
@@ -126,7 +126,7 @@ HnSwitches.prototype.toggle = function(switchName, hostname, newVal) {
 
 /******************************************************************************/
 
-HnSwitches.prototype.toggleZ = function(switchName, hostname, newState) {
+HnSwitches.prototype.toggleOneZ = function(switchName, hostname, newState) {
     var bitOffset = switchBitOffsets[switchName];
     if ( bitOffset === undefined ) {
         return false;
@@ -155,6 +155,47 @@ HnSwitches.prototype.toggleZ = function(switchName, hostname, newState) {
 
 /******************************************************************************/
 
+HnSwitches.prototype.toggleBranchZ = function(switchName, targetHostname, newState) {
+    var changed = this.toggleOneZ(switchName, targetHostname, newState);
+
+    var targetLen = targetHostname.length;
+    var hostnames = [];
+
+    for ( var hostname in this.switches ) {
+        if ( this.switches.hasOwnProperty(hostname) === false ) {
+            continue;
+        }
+        if ( hostname === targetHostname ) {
+            continue;
+        }
+        if ( hostname.length <= targetLen ) {
+            continue;
+        }
+        if ( hostname.slice(-targetLen) !== targetHostname ) {
+            continue;
+        }
+        if ( hostname.charAt(hostname.length - targetLen - 1) !== '.' ) {
+            continue;
+        }
+        hostnames.push(hostname);
+    }
+
+    // Decreasing length order so that all switch states are inherited from
+    // targetHostname.
+    hostnames.sort(function(a, b) {
+        return b.length - a.length;
+    });
+
+    var i = hostnames.length;
+    while ( i-- ) {
+        changed = this.toggleOneZ(switchName, hostnames[i], newState) || changed;
+    }
+
+    return changed;
+};
+
+/******************************************************************************/
+
 // 0 = inherit from broader scope, up to default state
 // 1 = non-default state
 // 2 = forced default state (to override a broader non-default state)
diff --git a/src/js/ublock.js b/src/js/ublock.js
index 7cc9781d2..329724ec4 100644
--- a/src/js/ublock.js
+++ b/src/js/ublock.js
@@ -319,29 +319,12 @@ var matchWhitelistDirective = function(url, hostname, directive) {
 /******************************************************************************/
 
 µBlock.toggleHostnameSwitch = function(details) {
-    var hostname = details.hostname;
-    var fromHostname = details.fromHostname || hostname;
     var changed = false;
 
-    var fromHostnames = [];
-    var pos;
-    for (;;) {
-        fromHostnames.push(fromHostname);
-        if ( fromHostname === hostname ) {
-            break;
-        }
-        pos = fromHostname.indexOf('.');
-        if ( pos === -1 ) {
-            break;
-        }
-        fromHostname = fromHostname.slice(pos + 1);
-    }
-
-    var i = fromHostnames.length;
-    while ( i-- ) {
-        if ( this.hnSwitches.toggleZ(details.name, fromHostnames[i], details.state) ) {
-            changed = true;
-        }
+    if ( details.deep === true ) {
+        changed = this.hnSwitches.toggleBranchZ(details.name, details.hostname, details.state);
+    } else {
+        changed = this.hnSwitches.toggleOneZ(details.name, details.hostname, details.state);
     }
 
     if ( changed ) {