diff --git a/src/js/background.js b/src/js/background.js
index 516774261..109bdde05 100644
--- a/src/js/background.js
+++ b/src/js/background.js
@@ -48,6 +48,7 @@ const µBlock = (function() { // jshint ignore:line
         cacheControlForFirefox1376932: 'no-cache, no-store, must-revalidate',
         consoleLogLevel: 'unset',
         debugScriptlets: false,
+        debugScriptletInjector: false,
         disableWebAssembly: false,
         ignoreRedirectFilters: false,
         ignoreScriptInjectFilters: false,
diff --git a/src/js/redirect-engine.js b/src/js/redirect-engine.js
index e9819e63a..5a512f288 100644
--- a/src/js/redirect-engine.js
+++ b/src/js/redirect-engine.js
@@ -65,6 +65,9 @@ const immutableResources = new Map([
         alias: 'ampproject.org/v0.js',
         inject: false
     } ],
+    [ 'bab-defuser.js', {
+        alias: 'nobab.js',
+    } ],
     [ 'chartbeat.js', {
         alias: 'static.chartbeat.com/chartbeat.js',
         inject: false
@@ -127,6 +130,14 @@ const immutableResources = new Map([
         alias: 'd3pkae9owd2lcf.cloudfront.net/mb105.js',
         inject: false
     } ],
+    [ 'nano-setInterval-booster.js', {
+        alias: 'nano-sib.js',
+        redirect: false
+    } ],
+    [ 'nano-setTimeout-booster.js', {
+        alias: 'nano-stb.js',
+        redirect: false
+    } ],
     [ 'noeval-silent.js', {
         alias: 'silent-noeval.js',
     } ],
@@ -165,8 +176,20 @@ const immutableResources = new Map([
     [ 'set-constant.js', {
         redirect: false
     } ],
+    [ 'setInterval-defuser.js', {
+        alias: 'sid.js',
+        redirect: false
+    } ],
+    [ 'setInterval-logger.js', {
+        alias: 'sil.js',
+        redirect: false
+    } ],
     [ 'setTimeout-defuser.js', {
-        alias: 'stod.js',
+        alias: 'std.js',
+        redirect: false
+    } ],
+    [ 'setTimeout-logger.js', {
+        alias: 'stl.js',
         redirect: false
     } ],
     [ 'webrtc-if.js', {
@@ -680,7 +703,7 @@ RedirectEngine.prototype.loadBuiltinResources = function() {
             const match = /^\/web_accessible_resources\/([^?]+)/.exec(result.url);
             if ( match === null ) { continue; }
             const name = match[1];
-            const content = result.content.replace(/^\/\*[\S\s]+?\*\/\s*/, '');
+            const content = result.content.replace(/^\/\*[\S\s]+?\n\*\/\s*/, '');
             const details = immutableResources.get(name);
             const entry = RedirectEntry.fromSelfie({
                 mime: mimeFromName(name),
diff --git a/src/js/scriptlet-filtering.js b/src/js/scriptlet-filtering.js
index 4f9ddee41..a597883be 100644
--- a/src/js/scriptlet-filtering.js
+++ b/src/js/scriptlet-filtering.js
@@ -210,7 +210,7 @@
             let pos = args.indexOf(',');
             if ( pos === -1 ) { pos = args.length; }
             const arg = args.slice(0, pos).trim().replace(reEscapeScriptArg, '\\$&');
-            content = content.replace('{{' + i + '}}', arg);
+            content = content.replace(`{{${i}}}`, arg);
             args = args.slice(pos + 1).trim();
             i++;
         }
@@ -227,7 +227,7 @@
             .setDocOriginFromURL(details.url)
             .setFilter({
                 source: 'cosmetic',
-                raw: (isException ? '#@#' : '##') + '+js(' + token + ')'
+                raw: (isException ? '#@#' : '##') + `+js(${token})`
             })
             .toLogger();
     };
@@ -356,6 +356,10 @@
 
         if ( out.length === 0 ) { return; }
 
+        if ( µb.hiddenSettings.debugScriptlets ) {
+            out.unshift('debugger');
+        }
+
         return out.join('\n');
     };
 
@@ -375,7 +379,7 @@
         const scriptlets = µb.scriptletFilteringEngine.retrieve(request);
         if ( scriptlets === undefined ) { return; }
         let code = contentscriptCode.assemble(request.hostname, scriptlets);
-        if ( µb.hiddenSettings.debugScriptlets ) {
+        if ( µb.hiddenSettings.debugScriptletInjector ) {
             code = 'debugger;\n' + code;
         }
         vAPI.tabs.injectScript(
diff --git a/src/web_accessible_resources/bab-defuser.js b/src/web_accessible_resources/bab-defuser.js
new file mode 100644
index 000000000..32a298335
--- /dev/null
+++ b/src/web_accessible_resources/bab-defuser.js
@@ -0,0 +1,87 @@
+/*******************************************************************************
+
+    uBlock Origin - a browser extension to block requests.
+    Copyright (C) 2019-present 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
+*/
+
+(function() {
+    'use strict';
+    const signatures = [
+        [ 'blockadblock' ],
+        [ 'babasbm' ],
+        [ /getItem\('babn'\)/ ],
+        [
+            'getElementById',
+            'String.fromCharCode',
+            'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
+            'charAt',
+            'DOMContentLoaded',
+            'AdBlock',
+            'addEventListener',
+            'doScroll',
+            'fromCharCode',
+            '<<2|r>>4',
+            'sessionStorage',
+            'clientWidth',
+            'localStorage',
+            'Math',
+            'random'
+        ],
+    ];
+    const check = function(s) {
+        for ( let i = 0; i < signatures.length; i++ ) {
+            const tokens = signatures[i];
+            let match = 0;
+            for ( let j = 0; j < tokens.length; j++ ) {
+                const token = tokens[j];
+                const pos = token instanceof RegExp
+                    ? s.search(token)
+                    : s.indexOf(token);
+                if ( pos !== -1 ) { match += 1; }
+            }
+            if ( (match / tokens.length) >= 0.8 ) { return true; }
+        }
+        return false;
+    };
+    window.eval = new Proxy(window.eval, {              // jshint ignore: line
+        apply: function(target, thisArg, args) {
+            const a = args[0];
+            if ( typeof a !== 'string' || !check(a) ) {
+                return target.apply(thisArg, args);
+            }
+            if ( document.body ) {
+                document.body.style.removeProperty('visibility');
+            }
+            let el = document.getElementById('babasbmsgx');
+            if ( el ) {
+                el.parentNode.removeChild(el);
+            }
+        }
+    });
+    window.setTimeout = new Proxy(window.setTimeout, {
+        apply: function(target, thisArg, args) {
+            const a = args[0];
+            if (
+                typeof a !== 'string' ||
+                /\.bab_elementid.$/.test(a) === false
+            ) {
+                return target.apply(thisArg, args);
+            }
+        }
+    });
+})();
diff --git a/src/web_accessible_resources/nano-setInterval-booster.js b/src/web_accessible_resources/nano-setInterval-booster.js
new file mode 100644
index 000000000..f08c6401f
--- /dev/null
+++ b/src/web_accessible_resources/nano-setInterval-booster.js
@@ -0,0 +1,51 @@
+/*******************************************************************************
+
+    Imported from:
+      https://github.com/NanoAdblocker/NanoFilters/blob/1f3be7211bb0809c5106996f52564bf10c4525f7/NanoFiltersSource/NanoResources.txt#L126
+
+    Speed up or down setInterval, 3 optional arguments.
+    funcMatcher - The payload matcher, a string literal or a JavaScript RegExp,
+    defaults to match all.
+    delayMatcher - The delay matcher, an integer, defaults to 1000.
+    boostRatio - The delay multiplier when there is a match, 0.5 speeds up by
+    2 times and 2 slows down by 2 times, defaults to 0.05 or speed up 20 times.
+    Speed up and down both cap at 50 times.
+
+*/
+
+(function() {
+    'use strict';
+    let needle = '{{1}}';
+    let delay = parseInt('{{2}}', 10);
+    let boost = parseFloat('{{3}}');
+    if ( needle === '' || needle === '{{1}}' ) {
+        needle = '.?';
+    } else if ( needle.charAt(0) === '/' && needle.slice(-1) === '/' ) {
+        needle = needle.slice(1, -1);
+    } else {
+        needle = needle.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+    }
+    needle = new RegExp(needle);
+    if ( isNaN(delay) || !isFinite(delay) ) {
+        delay = 1000;
+    }
+    if ( isNaN(boost) || !isFinite(boost) ) {
+        boost = 0.05;
+    }
+    if ( boost < 0.02 ) {
+        boost = 0.02;
+    }
+    if ( boost > 50 ) {
+        boost = 50;
+    }
+    window.setInterval = new Proxy(window.setInterval, {
+        apply: function(target, thisArg, args) {
+            const a = args[0];
+            const b = args[1];
+            if ( b === delay && needle.test(a.toString()) ) {
+                args[1] = b * boost;
+            }
+            return target.apply(thisArg, args);
+        }
+    });
+})();
diff --git a/src/web_accessible_resources/nano-setTimeout-booster.js b/src/web_accessible_resources/nano-setTimeout-booster.js
new file mode 100644
index 000000000..afce15579
--- /dev/null
+++ b/src/web_accessible_resources/nano-setTimeout-booster.js
@@ -0,0 +1,51 @@
+/*******************************************************************************
+
+    Originally imported from:
+      https://github.com/NanoAdblocker/NanoFilters/blob/1f3be7211bb0809c5106996f52564bf10c4525f7/NanoFiltersSource/NanoResources.txt#L82
+
+    Speed up or down setTimeout, 3 optional arguments.
+    funcMatcher - The payload matcher, a string literal or a JavaScript RegExp,
+    defaults to match all.
+    delayMatcher - The delay matcher, an integer, defaults to 1000.
+    boostRatio - The delay multiplier when there is a match, 0.5 speeds up by
+    2 times and 2 slows down by 2 times, defaults to 0.05 or speed up 20 times.
+    Speed up and down both cap at 50 times.
+
+*/
+
+(function() {
+    'use strict';
+    let needle = '{{1}}';
+    let delay = parseInt('{{2}}', 10);
+    let boost = parseFloat('{{3}}');
+    if ( needle === '' || needle === '{{1}}' ) {
+        needle = '.?';
+    } else if ( needle.startsWith('/') && needle.endsWith('/') ) {
+        needle = needle.slice(1, -1);
+    } else {
+        needle = needle.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+    }
+    needle = new RegExp(needle);
+    if ( isNaN(delay) || !isFinite(delay) ) {
+        delay = 1000;
+    }
+    if ( isNaN(boost) || !isFinite(boost) ) {
+        boost = 0.05;
+    }
+    if ( boost < 0.02 ) {
+        boost = 0.02;
+    }
+    if ( boost > 50 ) {
+        boost = 50;
+    }
+    window.setTimeout = new Proxy(window.setTimeout, {
+        apply: function(target, thisArg, args) {
+            const a = args[0];
+            const b = args[1];
+            if ( b === delay && needle.test(a.toString()) ) {
+                args[1] = b * boost;
+            }
+            return target.apply(thisArg, args);
+        }
+    });
+})();
diff --git a/src/web_accessible_resources/setInterval-defuser.js b/src/web_accessible_resources/setInterval-defuser.js
new file mode 100644
index 000000000..c443ffcdf
--- /dev/null
+++ b/src/web_accessible_resources/setInterval-defuser.js
@@ -0,0 +1,44 @@
+/*******************************************************************************
+
+    uBlock Origin - a browser extension to block requests.
+    Copyright (C) 2019-present 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
+*/
+
+(function() {
+    'use strict';
+    let needle = '{{1}}';
+    const delay = parseInt('{{2}}', 10);
+    if ( needle === '' || needle === '{{1}}' ) {
+        needle = '.?';
+    } else if ( needle.startsWith('/') && needle.endsWith('/') ) {
+        needle = needle.slice(1,-1);
+    } else {
+        needle = needle.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+    }
+    needle = new RegExp(needle);
+    window.setInterval = new Proxy(window.setInterval, {
+        apply: function(target, thisArg, args) {
+            const a = args[0];
+            const b = args[1];
+            if ( (isNaN(delay) || b === delay) && needle.test(a.toString()) ) {
+                args[0] = function(){};
+            }
+            return target.apply(thisArg, args);
+        }
+    });
+})();
diff --git a/src/web_accessible_resources/setInterval-logger.js b/src/web_accessible_resources/setInterval-logger.js
new file mode 100644
index 000000000..49e05bc73
--- /dev/null
+++ b/src/web_accessible_resources/setInterval-logger.js
@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+    uBlock Origin - a browser extension to block requests.
+    Copyright (C) 2019-present 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
+*/
+
+(function() {
+    'use strict';
+    const log = console.log.bind(console);
+    window.setInterval = new Proxy(window.setInterval, {
+        apply: function(target, thisArg, args) {
+            const a = args[0];
+            const b = args[1];
+            log('uBO: setInterval("%s", %s)', a.toString(), b);
+            return target.apply(thisArg, args);
+        }
+    });
+})();
diff --git a/src/web_accessible_resources/setTimeout-logger.js b/src/web_accessible_resources/setTimeout-logger.js
new file mode 100644
index 000000000..604eef004
--- /dev/null
+++ b/src/web_accessible_resources/setTimeout-logger.js
@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+    uBlock Origin - a browser extension to block requests.
+    Copyright (C) 2019-present 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
+*/
+
+(function() {
+    'use strict';
+    const log = console.log.bind(console);
+    window.setTimeout = new Proxy(window.setTimeout, {
+        apply: function(target, thisArg, args) {
+            const a = args[0];
+            const b = args[1];
+            log('uBO: setTimeout("%s", %s)', a.toString(), b);
+            return target.apply(thisArg, args);
+        }
+    });
+})();