diff --git a/app/model/Service.js b/app/model/Service.js
index 8a08e427..a381c5b3 100644
--- a/app/model/Service.js
+++ b/app/model/Service.js
@@ -73,6 +73,14 @@ Ext.define('Rambox.model.Service', {
 		name: 'custom_css_complex'
 		,type: 'boolean'
 		,defaultValue: false
+	},{
+		name: 'passive_event_listeners'
+		,type: 'boolean'
+		,defaultValue: true
+	},{
+		name: 'slowed_timers'
+		,type: 'boolean'
+		,defaultValue: true
 	},{
 		 name: 'zoomLevel'
 		,type: 'number'
diff --git a/app/store/Services.js b/app/store/Services.js
index ae5872a8..1905943b 100644
--- a/app/store/Services.js
+++ b/app/store/Services.js
@@ -40,6 +40,8 @@ Ext.define('Rambox.store.Services', {
 					,includeInGlobalUnreadCounter: service.get('includeInGlobalUnreadCounter')
 					,displayTabUnreadCounter: service.get('displayTabUnreadCounter')
 					,custom_css_complex: service.get('custom_css_complex')
+					,passive_event_listeners: service.get('passive_event_listeners')
+					,slowed_timers: service.get('slowed_timers')
 					,enabled: service.get('enabled')
 					,record: service
 					,tabConfig: {
diff --git a/app/ux/WebView.js b/app/ux/WebView.js
index 0ef54f4a..842f7356 100644
--- a/app/ux/WebView.js
+++ b/app/ux/WebView.js
@@ -459,6 +459,21 @@ Ext.define('Rambox.ux.WebView',{
 				js_inject += js_preventBlink;
 			}
 
+			// Use passive listeners by default
+			if (me.record.get('passive_event_listeners'))
+			{
+				// 3rdparty: This uses npm 'default-passive-events' 1.0.10 inline. Link to license:
+				// https://github.com/zzarcon/default-passive-events/blob/master/LICENSE
+				const passive_event_listeners = `const eventListenerOptionsSupported=()=>{let supported=!1;try{const opts=Object.defineProperty({},"passive",{get(){supported=!0}});window.addEventListener("test",null,opts),window.removeEventListener("test",null,opts)}catch(e){}return supported},defaultOptions={passive:!0,capture:!1},supportedPassiveTypes=["scroll","wheel","touchstart","touchmove","touchenter","touchend","touchleave","mouseout","mouseleave","mouseup","mousedown","mousemove","mouseenter","mousewheel","mouseover"],getDefaultPassiveOption=(passive,eventName)=>void 0!==passive?passive:-1!==supportedPassiveTypes.indexOf(eventName)&&defaultOptions.passive,getWritableOptions=options=>{const passiveDescriptor=Object.getOwnPropertyDescriptor(options,"passive");return passiveDescriptor&&!0!==passiveDescriptor.writable&&void 0===passiveDescriptor.set?Object.assign({},options):options},overwriteAddEvent=superMethod=>{EventTarget.prototype.addEventListener=function(type,listener,options){const usesListenerOptions="object"==typeof options&&null!==options,useCapture=usesListenerOptions?options.capture:options;(options=usesListenerOptions?getWritableOptions(options):{}).passive=getDefaultPassiveOption(options.passive,type),options.capture=void 0===useCapture?defaultOptions.capture:useCapture,superMethod.call(this,type,listener,options)},EventTarget.prototype.addEventListener._original=superMethod},supportsPassive=eventListenerOptionsSupported();if(supportsPassive){const addEvent=EventTarget.prototype.addEventListener;overwriteAddEvent(addEvent)}`;
+				js_inject += '{' + passive_event_listeners + '}';
+			}
+
+			// Use slowed timers by default
+			if (me.record.get('slowed_timers'))
+			{
+				const slowed_timers = `window.setTimeout=window.setTimeout;const __setTimeout=window.setTimeout;window.setTimeout=function(func,time){let a=time;return a<100&&(a=100),__setTimeout(func,a)};`;
+				js_inject += '{' + slowed_timers + '}';
+			}
 
 			// Scroll always to top (bug)
 			js_inject += 'document.body.scrollTop=0;';
diff --git a/app/view/add/Add.js b/app/view/add/Add.js
index 8d7ecd43..dda3c3d1 100644
--- a/app/view/add/Add.js
+++ b/app/view/add/Add.js
@@ -19,7 +19,7 @@ Ext.define('Rambox.view.add.Add',{
 	// defaults
 	,modal: true
 	,width: 500
-	,height: 700
+	,height: 750
 	,autoShow: true
 	,resizable: false
 	,draggable: false
@@ -191,6 +191,22 @@ Ext.define('Rambox.view.add.Add',{
 										,uncheckedValue: false
 										,inputValue: true
 									}
+									,{
+									    xtype: 'checkbox'
+									   ,boxLabel: "Use passive listeners"
+									   ,name: 'passive_event_listeners'
+									   ,checked: me.edit ? me.record.get('passive_event_listeners') : true
+									   ,uncheckedValue: false
+									   ,inputValue: true
+									}
+									,{
+									    xtype: 'checkbox'
+									   ,boxLabel: "100ms timer granularity"
+									   ,name: 'slowed_timers'
+									   ,checked: me.edit ? me.record.get('slowed_timers') : true
+									   ,uncheckedValue: false
+									   ,inputValue: true
+									}
 									,{
 										 xtype: 'checkbox'
 										,boxLabel: locale['app.window[19]']
diff --git a/app/view/add/AddController.js b/app/view/add/AddController.js
index 15c1afe2..2198cb0a 100644
--- a/app/view/add/AddController.js
+++ b/app/view/add/AddController.js
@@ -42,6 +42,8 @@ Ext.define('Rambox.view.add.AddController', {
 				,custom_js: formValues.custom_js
 				,custom_css: formValues.custom_css
 				,custom_css_complex: formValues.custom_css_complex
+				,passive_event_listeners: formValues.passive_event_listeners
+				,slowed_timers: formValues.slowed_timers
 			});
 
 			var view = Ext.getCmp('tab_'+win.record.get('id'));
@@ -97,6 +99,8 @@ Ext.define('Rambox.view.add.AddController', {
 				,custom_js: formValues.custom_js
 				,custom_css: formValues.custom_css
 				,custom_css_complex: formValues.custom_css_complex
+				,passive_event_listeners: formValues.passive_event_listeners
+				,slowed_timers: formValues.slowed_timers
 			});
 			service.save();
 			Ext.getStore('Services').add(service);
diff --git a/app/view/main/MainController.js b/app/view/main/MainController.js
index 7eb5d5ce..d55acba8 100644
--- a/app/view/main/MainController.js
+++ b/app/view/main/MainController.js
@@ -107,6 +107,8 @@ Ext.define('Rambox.view.main.MainController', {
 				,includeInGlobalUnreadCounter: rec.get('includeInGlobalUnreadCounter')
 				,displayTabUnreadCounter: rec.get('displayTabUnreadCounter')
 				,custom_css_complex: rec.get('custom_css_complex')
+				,passive_event_listeners: rec.get('passive_event_listeners')
+				,slowed_timers: rec.get('slowed_timers')
 				,enabled: rec.get('enabled')
 				,record: rec
 				,hidden: hideTab