diff --git a/src/css/logger-ui.css b/src/css/logger-ui.css
index 6c2ea0db7..041d6342f 100644
--- a/src/css/logger-ui.css
+++ b/src/css/logger-ui.css
@@ -570,7 +570,9 @@ body.colorBlind  #netFilteringDialog .dialog > div.containers > div.dynamic tr.e
     }
 #filterFinderDialog .dialog code {
     background: #eee;
+    font-size: 85%;
     padding: 3px;
+    word-break: break-all;
     }
 #filterFinderDialog .dialog ul {
     font-size: larger;
diff --git a/src/js/background.js b/src/js/background.js
index 4e996a3fc..a7fdaa340 100644
--- a/src/js/background.js
+++ b/src/js/background.js
@@ -93,7 +93,7 @@ return {
 
     // read-only
     systemSettings: {
-        compiledMagic: 'bxajckhlxyck',
+        compiledMagic: 'rzohdugizuxh',
         selfieMagic: 'mnigwksyvgkv'
     },
 
diff --git a/src/js/static-net-filtering.js b/src/js/static-net-filtering.js
index 5fe851cd0..92cc7af10 100644
--- a/src/js/static-net-filtering.js
+++ b/src/js/static-net-filtering.js
@@ -213,14 +213,138 @@ var toHex = function(n) {
     return n.toString(16);
 };
 
-var hostnameHit = function(hostname) {
+/******************************************************************************/
+
+// Hostname test helpers: the optimal test function is picked
+// according to the content of the `domain` filter option, 
+
+var hostnameTestPicker = function(owner) {
+    var domainOpt = owner.domainOpt;
+
+    // Only one hostname
+    if ( domainOpt.indexOf('|') === -1 ) {
+        return domainOpt.charAt(0) !== '~' ? hostnameHitTest : hostnameMissTest;
+    }
+
+    // Multiple hostnames: use a dictionary.
+    var dict = owner._hostnameDict = Object.create(null);
+    var hostnames = domainOpt.split('|');
+    var i, hostname;
+
+    // First find out whether we have a homogeneous dictionary
+    var hit = false, miss = false;
+    i = hostnames.length;
+    while ( i-- ) {
+        if ( hostnames[i].charAt(0) !== '~' ) {
+            hit = true;
+            if ( miss ) {
+                break;
+            }
+        } else {
+            miss = true;
+            if ( hit ) {
+                break;
+            }
+        }
+    }
+
+    // Heterogenous dictionary: this can happen, though VERY rarely.
+    // Spotted one occurrence in EasyList Lite (cjxlist.txt):
+    //   domain=photobucket.com|~secure.photobucket.com
+    if ( hit && miss ) {
+        i = hostnames.length;
+        while ( i-- ) {
+            hostname = hostnames[i];
+            if ( hostname.charAt(0) !== '~' ) {
+                dict[hostname] = true;
+            } else {
+                dict[hostname.slice(1)] = false;
+            }
+        }
+        return hostnameMixedSetTest;
+    }
+
+    // Homogeneous dictionary.
+    i = hostnames.length;
+    while ( i-- ) {
+        hostname = hostnames[i];
+        if ( hostname.charAt(0) !== '~' ) {
+            dict[hostname] = true;
+        } else {
+            dict[hostname.slice(1)] = true;
+        }
+    }
+
+    return hit ? hostnameHitSetTest : hostnameMissSetTest;
+};
+
+var hostnameHitTest = function(owner) {
+    var hostname = owner.domainOpt;
     return pageHostnameRegister.slice(0 - hostname.length) === hostname;
 };
 
-var hostnameMiss = function(hostname) {
+var hostnameMissTest = function(owner) {
+    var hostname = owner.domainOpt;
     return pageHostnameRegister.slice(1 - hostname.length) !== hostname.slice(1);
 };
 
+var hostnameHitSetTest = function(owner) {
+    var dict = owner._hostnameDict;
+    var needle = pageHostnameRegister;
+    var pos;
+    for (;;) {
+        if ( dict[needle] ) {
+            return true;
+        }
+        pos = needle.indexOf('.');
+        if ( pos === -1 ) {
+            break;
+        }
+        needle = needle.slice(pos + 1);
+    }
+    return false;
+};
+
+var hostnameMissSetTest = function(owner) {
+    var dict = owner._hostnameDict;
+    var needle = pageHostnameRegister;
+    var pos;
+    for (;;) {
+        if ( dict[needle] ) {
+            return false;
+        }
+        pos = needle.indexOf('.');
+        if ( pos === -1 ) {
+            break;
+        }
+        needle = needle.slice(pos + 1);
+    }
+
+    return true;
+};
+
+var hostnameMixedSetTest = function(owner) {
+    var dict = owner._hostnameDict;
+    var needle = pageHostnameRegister;
+    var hit = false;
+    var v, pos;
+    for (;;) {
+        v = dict[needle] || undefined;
+        if ( v === false ) {
+            return false;
+        }
+        if ( v /* === true */ ) {
+            hit = true;
+        }
+        pos = needle.indexOf('.');
+        if ( pos === -1 ) {
+            break;
+        }
+        needle = needle.slice(pos + 1);
+    }
+    return hit;
+};
+
 /*******************************************************************************
 
 Filters family tree:
@@ -280,15 +404,15 @@ FilterPlain.fromSelfie = function(s) {
 
 /******************************************************************************/
 
-var FilterPlainHostname = function(s, tokenBeg, hostname) {
+var FilterPlainHostname = function(s, tokenBeg, domainOpt) {
     this.s = s;
     this.tokenBeg = tokenBeg;
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 
 FilterPlainHostname.prototype.match = function(url, tokenBeg) {
-    return this.hostnameTest(this.hostname) &&
+    return this.hostnameTest(this) &&
            url.substr(tokenBeg - this.tokenBeg, this.s.length) === this.s;
 };
 
@@ -298,11 +422,11 @@ FilterPlainHostname.prototype.rtfid = 'ah';
 
 FilterPlainHostname.prototype.toSelfie =
 FilterPlainHostname.prototype.rtCompile = function() {
-    return this.s + '\t' + this.tokenBeg + '\t' + this.hostname;
+    return this.s + '\t' + this.tokenBeg + '\t' + this.domainOpt;
 };
 
-FilterPlainHostname.compile = function(details, hostname) {
-    return details.f + '\t' + details.tokenBeg + '\t' + hostname;
+FilterPlainHostname.compile = function(details) {
+    return details.f + '\t' + details.tokenBeg + '\t' + details.domainOpt;
 };
 
 FilterPlainHostname.fromSelfie = function(s) {
@@ -339,14 +463,14 @@ FilterPlainPrefix0.fromSelfie = function(s) {
 
 /******************************************************************************/
 
-var FilterPlainPrefix0Hostname = function(s, hostname) {
+var FilterPlainPrefix0Hostname = function(s, domainOpt) {
     this.s = s;
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 
 FilterPlainPrefix0Hostname.prototype.match = function(url, tokenBeg) {
-    return this.hostnameTest(this.hostname) &&
+    return this.hostnameTest(this) &&
            url.substr(tokenBeg, this.s.length) === this.s;
 };
 
@@ -356,11 +480,11 @@ FilterPlainPrefix0Hostname.prototype.rtfid = '0ah';
 
 FilterPlainPrefix0Hostname.prototype.toSelfie =
 FilterPlainPrefix0Hostname.prototype.rtCompile = function() {
-    return this.s + '\t' + this.hostname;
+    return this.s + '\t' + this.domainOpt;
 };
 
-FilterPlainPrefix0Hostname.compile = function(details, hostname) {
-    return details.f + '\t' + hostname;
+FilterPlainPrefix0Hostname.compile = function(details) {
+    return details.f + '\t' + details.domainOpt;
 };
 
 FilterPlainPrefix0Hostname.fromSelfie = function(s) {
@@ -397,14 +521,14 @@ FilterPlainPrefix1.fromSelfie = function(s) {
 
 /******************************************************************************/
 
-var FilterPlainPrefix1Hostname = function(s, hostname) {
+var FilterPlainPrefix1Hostname = function(s, domainOpt) {
     this.s = s;
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 
 FilterPlainPrefix1Hostname.prototype.match = function(url, tokenBeg) {
-    return this.hostnameTest(this.hostname) &&
+    return this.hostnameTest(this) &&
            url.substr(tokenBeg - 1, this.s.length) === this.s;
 };
 
@@ -414,11 +538,11 @@ FilterPlainPrefix1Hostname.prototype.rtfid = '1ah';
 
 FilterPlainPrefix1Hostname.prototype.toSelfie =
 FilterPlainPrefix1Hostname.prototype.rtCompile = function() {
-    return this.s + '\t' + this.hostname;
+    return this.s + '\t' + this.domainOpt;
 };
 
-FilterPlainPrefix1Hostname.compile = function(details, hostname) {
-    return details.f + '\t' + hostname;
+FilterPlainPrefix1Hostname.compile = function(details) {
+    return details.f + '\t' + details.domainOpt;
 };
 
 FilterPlainPrefix1Hostname.fromSelfie = function(s) {
@@ -455,14 +579,14 @@ FilterPlainLeftAnchored.fromSelfie = function(s) {
 
 /******************************************************************************/
 
-var FilterPlainLeftAnchoredHostname = function(s, hostname) {
+var FilterPlainLeftAnchoredHostname = function(s, domainOpt) {
     this.s = s;
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 
 FilterPlainLeftAnchoredHostname.prototype.match = function(url) {
-    return this.hostnameTest(this.hostname) &&
+    return this.hostnameTest(this) &&
            url.slice(0, this.s.length) === this.s;
 };
 
@@ -472,11 +596,11 @@ FilterPlainLeftAnchoredHostname.prototype.rtfid = '|ah';
 
 FilterPlainLeftAnchoredHostname.prototype.toSelfie =
 FilterPlainLeftAnchoredHostname.prototype.rtCompile = function() {
-    return this.s + '\t' + this.hostname;
+    return this.s + '\t' + this.domainOpt;
 };
 
-FilterPlainLeftAnchoredHostname.compile = function(details, hostname) {
-    return details.f + '\t' + hostname;
+FilterPlainLeftAnchoredHostname.compile = function(details) {
+    return details.f + '\t' + details.domainOpt;
 };
 
 FilterPlainLeftAnchoredHostname.fromSelfie = function(s) {
@@ -513,14 +637,14 @@ FilterPlainRightAnchored.fromSelfie = function(s) {
 
 /******************************************************************************/
 
-var FilterPlainRightAnchoredHostname = function(s, hostname) {
+var FilterPlainRightAnchoredHostname = function(s, domainOpt) {
     this.s = s;
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 
 FilterPlainRightAnchoredHostname.prototype.match = function(url) {
-    return this.hostnameTest(this.hostname) &&
+    return this.hostnameTest(this) &&
            url.slice(-this.s.length) === this.s;
 };
 
@@ -530,11 +654,11 @@ FilterPlainRightAnchoredHostname.prototype.rtfid = 'a|h';
 
 FilterPlainRightAnchoredHostname.prototype.toSelfie =
 FilterPlainRightAnchoredHostname.prototype.rtCompile = function() {
-    return this.s + '\t' + this.hostname;
+    return this.s + '\t' + this.domainOpt;
 };
 
-FilterPlainRightAnchoredHostname.compile = function(details, hostname) {
-    return details.f + '\t' + hostname;
+FilterPlainRightAnchoredHostname.compile = function(details) {
+    return details.f + '\t' + details.domainOpt;
 };
 
 FilterPlainRightAnchoredHostname.fromSelfie = function(s) {
@@ -584,14 +708,14 @@ FilterPlainHnAnchored.fromSelfie = function(s) {
 
 // https://github.com/gorhill/uBlock/issues/142
 
-var FilterPlainHnAnchoredHostname = function(s, hostname) {
+var FilterPlainHnAnchoredHostname = function(s, domainOpt) {
     this.s = s;
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 
 FilterPlainHnAnchoredHostname.prototype.match = function(url, tokenBeg) {
-    if ( this.hostnameTest(this.hostname) === false ) {
+    if ( this.hostnameTest(this) === false ) {
         return false;
     }
     if ( url.substr(tokenBeg, this.s.length) !== this.s ) {
@@ -609,11 +733,11 @@ FilterPlainHnAnchoredHostname.prototype.rtfid = '||ah';
 
 FilterPlainHnAnchoredHostname.prototype.toSelfie =
 FilterPlainHnAnchoredHostname.prototype.rtCompile = function() {
-    return this.s + '\t' + this.hostname;
+    return this.s + '\t' + this.domainOpt;
 };
 
-FilterPlainHnAnchoredHostname.compile = function(details, hostname) {
-    return details.f + '\t' + hostname;
+FilterPlainHnAnchoredHostname.compile = function(details) {
+    return details.f + '\t' + details.domainOpt;
 };
 
 FilterPlainHnAnchoredHostname.fromSelfie = function(s) {
@@ -660,16 +784,16 @@ FilterGeneric.fromSelfie = function(s) {
 
 // Generic filter
 
-var FilterGenericHostname = function(s, anchor, hostname) {
+var FilterGenericHostname = function(s, anchor, domainOpt) {
     FilterGeneric.call(this, s, anchor);
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 FilterGenericHostname.prototype = Object.create(FilterGeneric.prototype);
 FilterGenericHostname.prototype.constructor = FilterGenericHostname;
 
 FilterGenericHostname.prototype.match = function(url) {
-    if ( this.hostnameTest(this.hostname) === false ) {
+    if ( this.hostnameTest(this) === false ) {
         return false;
     }
     return FilterGeneric.prototype.match.call(this, url);
@@ -681,11 +805,11 @@ FilterGenericHostname.prototype.rtfid = '_h';
 
 FilterGenericHostname.prototype.toSelfie =
 FilterGenericHostname.prototype.rtCompile = function() {
-    return FilterGeneric.prototype.toSelfie.call(this) + '\t' + this.hostname;
+    return FilterGeneric.prototype.toSelfie.call(this) + '\t' + this.domainOpt;
 };
 
-FilterGenericHostname.compile = function(details, hostname) {
-    return FilterGeneric.compile(details) + '\t' + hostname;
+FilterGenericHostname.compile = function(details) {
+    return FilterGeneric.compile(details) + '\t' + details.domainOpt;
 };
 
 FilterGenericHostname.fromSelfie = function(s) {
@@ -739,16 +863,16 @@ FilterGenericHnAnchored.fromSelfie = function(s) {
 
 /******************************************************************************/
 
-var FilterGenericHnAnchoredHostname = function(s, hostname) {
+var FilterGenericHnAnchoredHostname = function(s, domainOpt) {
     FilterGenericHnAnchored.call(this, s);
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 FilterGenericHnAnchoredHostname.prototype = Object.create(FilterGenericHnAnchored.prototype);
 FilterGenericHnAnchoredHostname.prototype.constructor = FilterGenericHnAnchoredHostname;
 
 FilterGenericHnAnchoredHostname.prototype.match = function(url) {
-    if ( this.hostnameTest(this.hostname) === false ) {
+    if ( this.hostnameTest(this) === false ) {
         return false;
     }
     return FilterGenericHnAnchored.prototype.match.call(this, url);
@@ -760,11 +884,11 @@ FilterGenericHnAnchoredHostname.prototype.rtfid = '||_h';
 
 FilterGenericHnAnchoredHostname.prototype.toSelfie =
 FilterGenericHnAnchoredHostname.prototype.rtCompile = function() {
-    return this.s + '\t' + this.hostname;
+    return this.s + '\t' + this.domainOpt;
 };
 
-FilterGenericHnAnchoredHostname.compile = function(details, hostname) {
-    return details.f + '\t' + hostname;
+FilterGenericHnAnchoredHostname.compile = function(details) {
+    return details.f + '\t' + details.domainOpt;
 };
 
 FilterGenericHnAnchoredHostname.fromSelfie = function(s) {
@@ -803,15 +927,15 @@ FilterRegex.fromSelfie = function(s) {
 
 /******************************************************************************/
 
-var FilterRegexHostname = function(s, hostname) {
+var FilterRegexHostname = function(s, domainOpt) {
     this.re = new RegExp(s);
-    this.hostname = hostname;
-    this.hostnameTest = hostname.charAt(0) !== '~' ? hostnameHit : hostnameMiss;
+    this.domainOpt = domainOpt;
+    this.hostnameTest = hostnameTestPicker(this);
 };
 
 FilterRegexHostname.prototype.match = function(url) {
     // test hostname first, it's cheaper than evaluating a regex
-    return this.hostnameTest(this.hostname) &&
+    return this.hostnameTest(this) &&
            this.re.test(url);
 };
 
@@ -821,11 +945,11 @@ FilterRegexHostname.prototype.rtfid = '//h';
 
 FilterRegexHostname.prototype.toSelfie =
 FilterRegexHostname.prototype.rtCompile = function() {
-    return this.re.source + '\t' + this.hostname;
+    return this.re.source + '\t' + this.domainOpt;
 };
 
-FilterRegexHostname.compile = function(details, hostname) {
-    return details.f + '\t' + hostname;
+FilterRegexHostname.compile = function(details) {
+    return details.f + '\t' + details.domainOpt;
 };
 
 FilterRegexHostname.fromSelfie = function(s) {
@@ -1144,6 +1268,9 @@ FilterBucket.fromSelfie = function() {
 /******************************************************************************/
 
 var getFilterClass = function(details) {
+    if ( details.domainOpt.length !== 0 ) {
+        return getHostnameBasedFilterClass(details);
+    }
     if ( details.isRegex ) {
         return FilterRegex;
     }
@@ -1232,7 +1359,7 @@ var FilterParser = function() {
     this.reCleanupHostname = /^\|\|[.*]*/;
     this.reIsolateHostname = /^([^\x00-\x24\x26-\x2C\x2F\x3A-\x5E\x60\x7B-\x7F]+)(.*)/;
     this.reHasUnicode = /[^\x00-\x7F]/;
-    this.hostnames = [];
+    this.domainOpt = '';
     this.reset();
 };
 
@@ -1265,7 +1392,7 @@ FilterParser.prototype.reset = function() {
     this.fopts = '';
     this.hostnameAnchored = false;
     this.hostnamePure = false;
-    this.hostnames.length = 0;
+    this.domainOpt = '';
     this.isRegex = false;
     this.thirdParty = false;
     this.token = '';
@@ -1313,15 +1440,6 @@ FilterParser.prototype.parseOptParty = function(firstParty, not) {
 
 /******************************************************************************/
 
-FilterParser.prototype.parseOptHostnames = function(raw) {
-    var hostnames = raw.split('|');
-    for ( var i = 0; i < hostnames.length; i++ ) {
-        this.hostnames.push(hostnames[i]);
-    }
-};
-
-/******************************************************************************/
-
 FilterParser.prototype.parseOptions = function(s) {
     this.fopts = s;
     var opts = s.split(',');
@@ -1358,7 +1476,7 @@ FilterParser.prototype.parseOptions = function(s) {
             continue;
         }
         if ( opt.slice(0,7) === 'domain=' ) {
-            this.parseOptHostnames(opt.slice(7));
+            this.domainOpt = opt.slice(7);
             continue;
         }
         if ( opt === 'important' ) {
@@ -1801,7 +1919,7 @@ FilterContainer.prototype.compile = function(raw, out) {
 
 FilterContainer.prototype.compileHostnameOnlyFilter = function(parsed, out) {
     // Can't fit the filter in a pure hostname dictionary.
-    if ( parsed.hostnames.length !== 0 ) {
+    if ( parsed.domainOpt.length !== 0 ) {
         return;
     }
 
@@ -1852,34 +1970,17 @@ FilterContainer.prototype.compileFilter = function(parsed, out) {
         party = parsed.firstParty ? FirstParty : ThirdParty;
     }
 
-    var filterClass;
-    var i = parsed.hostnames.length;
-
-    // Applies everywhere
-    if ( i === 0 ) {
-        filterClass = getFilterClass(parsed);
-        if ( filterClass === null ) {
-            return false;
-        }
-        this.compileToAtomicFilter(filterClass, parsed, party, out);
-        return true;
+    var filterClass = getFilterClass(parsed);
+    if ( filterClass === null ) {
+        return false;
     }
-
-    // Applies to specific domains
-    while ( i-- ) {
-        filterClass = getHostnameBasedFilterClass(parsed);
-        if ( filterClass === null ) {
-            return false;
-        }
-        this.compileToAtomicFilter(filterClass, parsed, party, out, parsed.hostnames[i]);
-    }
-
+    this.compileToAtomicFilter(filterClass, parsed, party, out);
     return true;
 };
 
 /******************************************************************************/
 
-FilterContainer.prototype.compileToAtomicFilter = function(filterClass, parsed, party, out, hostname) {
+FilterContainer.prototype.compileToAtomicFilter = function(filterClass, parsed, party, out) {
     var bits = parsed.action | parsed.important | party;
     var type = parsed.types;
     if ( type === 0 ) {
@@ -1888,7 +1989,7 @@ FilterContainer.prototype.compileToAtomicFilter = function(filterClass, parsed,
             toHex(bits) + '\v' +
             parsed.token + '\v' +
             filterClass.fid + '\v' +
-            filterClass.compile(parsed, hostname)
+            filterClass.compile(parsed)
         );
         return;
     }
@@ -1900,7 +2001,7 @@ FilterContainer.prototype.compileToAtomicFilter = function(filterClass, parsed,
                 toHex(bits | (bitOffset << 4)) + '\v' +
                 parsed.token + '\v' +
                 filterClass.fid + '\v' +
-                filterClass.compile(parsed, hostname)
+                filterClass.compile(parsed)
             );
         }
         bitOffset += 1;