diff --git a/tracker/tracker/src/main/index.ts b/tracker/tracker/src/main/index.ts
index d1f345d55..2bca8f1a9 100644
--- a/tracker/tracker/src/main/index.ts
+++ b/tracker/tracker/src/main/index.ts
@@ -40,6 +40,7 @@ import type { Options as TimingOptions } from './modules/timing.js'
 import type { Options as NetworkOptions } from './modules/network.js'
 import type { MouseHandlerOptions } from './modules/mouse.js'
 import type { SessionInfo } from './app/session.js'
+import type { CssRulesOptions } from './modules/cssrules.js'
 
 import type { StartOptions } from './app/index.js'
 //TODO: unique options init
@@ -61,7 +62,7 @@ export type Options = Partial<
   }
   // dev only
   __DISABLE_SECURE_MODE?: boolean
-  checkCssInterval?: number
+  css: CssRulesOptions
 }
 
 const DOCS_SETUP = '/en/sdk'
@@ -193,7 +194,7 @@ export default class API {
     Mouse(app, options.mouse)
     // inside iframe, we ignore viewport scroll
     Scroll(app, this.crossdomainMode)
-    CSSRules(app, options)
+    CSSRules(app, options.css)
     ConstructedStyleSheets(app)
     Console(app, options)
     Exception(app, options)
diff --git a/tracker/tracker/src/main/modules/cssrules.ts b/tracker/tracker/src/main/modules/cssrules.ts
index 0bb79c09b..cade75566 100644
--- a/tracker/tracker/src/main/modules/cssrules.ts
+++ b/tracker/tracker/src/main/modules/cssrules.ts
@@ -8,7 +8,12 @@ import {
 import { hasTag } from '../app/guards.js'
 import { nextID, styleSheetIDMap } from './constructedStyleSheets.js'
 
-export default function (app: App, opts: { checkCssInterval?: number }) {
+export interface CssRulesOptions {
+  checkCssInterval?: number
+  scanInMemoryCSS?: boolean
+}
+
+export default function (app: App, opts: CssRulesOptions) {
   if (app === null) return
   if (!window.CSSStyleSheet) {
     app.send(TechnicalInfo('no_stylesheet_prototype_in_window', ''))
@@ -22,6 +27,7 @@ export default function (app: App, opts: { checkCssInterval?: number }) {
   const checkIntervalMs = opts.checkCssInterval || 200
 
   function checkRuleChanges() {
+    if (!opts.scanInMemoryCSS) return
     for (let i = 0; i < document.styleSheets.length; i++) {
       try {
         const sheet = document.styleSheets[i]
@@ -171,7 +177,7 @@ export default function (app: App, opts: { checkCssInterval?: number }) {
   })
 
   function startChecking() {
-    if (checkInterval) return
+    if (checkInterval || !opts.scanInMemoryCSS) return
     checkInterval = window.setInterval(checkRuleChanges, checkIntervalMs)
   }