diff --git a/core/manipulate-dom.js b/core/manipulate-dom.js
index 16587457..870cc650 100644
--- a/core/manipulate-dom.js
+++ b/core/manipulate-dom.js
@@ -36,22 +36,14 @@ manipulateDOM._removeCrossOriginAndIntegrityAttr = function (details) {
         return;
     }
     if (details.statusCode === 200) {
-        let initiatorDomain, listedToManipulateDOM, negateHtmlFilter, filtering, header;
+        let initiatorDomain, header;
 
         initiatorDomain = helpers.extractDomainFromUrl(details.url, true) || Address.EXAMPLE;
-        listedToManipulateDOM = stateManager._domainIsListed(initiatorDomain, 'manipulate-dom');
-        negateHtmlFilter = stateManager.getInvertOption;
-
-        if ((negateHtmlFilter || listedToManipulateDOM) && !(negateHtmlFilter && listedToManipulateDOM)) {
-            filtering = true;
-        } else {
-            filtering = false;
-        }
 
         // by Jaap (https://gitlab.com/Jaaap)
         header = details.responseHeaders.find((h) => h.name.toLowerCase() === 'content-type');
 
-        if (header && filtering) {
+        if (header && manipulateDOM.checkHtmlFilterEnabled(initiatorDomain)) {
 
             let mimeType, isAllowlisted;
 
@@ -151,6 +143,22 @@ manipulateDOM._searchCharset = function (str, charset) {
     return str;
 };
 
+
+/**
+ * Public Methods
+ */
+
+manipulateDOM.checkHtmlFilterEnabled = function (url) {
+    let listedToManipulateDOM, negateHtmlFilter;
+    listedToManipulateDOM = stateManager._domainIsListed(url, 'manipulate-dom');
+    negateHtmlFilter = stateManager.getInvertOption;
+
+    if ((negateHtmlFilter || listedToManipulateDOM) && !(negateHtmlFilter && listedToManipulateDOM)) {
+        return true;
+    }
+    return false;
+};
+
 /**
  * Initializations
  */
diff --git a/core/state-manager.js b/core/state-manager.js
index 91c9a2ec..10fbe903 100644
--- a/core/state-manager.js
+++ b/core/state-manager.js
@@ -31,7 +31,7 @@ var stateManager = {};
  */
 
 stateManager.registerInjection = function (tabIdentifier, injection, url) {
-    let injectionIdentifier, registeredTab, injectionCount, missingCount, initiatorDomain, listedToManipulateDOM;
+    let injectionIdentifier, registeredTab, injectionCount, missingCount, initiatorDomain, htmlFilterIsActive;
 
     if (injection['result'] !== false) {
         injectionIdentifier = injection.source + injection.path;
@@ -40,7 +40,7 @@ stateManager.registerInjection = function (tabIdentifier, injection, url) {
     }
 
     initiatorDomain = helpers.extractDomainFromUrl(url, true) || Address.EXAMPLE;
-    listedToManipulateDOM = stateManager._domainIsListed(initiatorDomain, 'manipulate-dom');
+    htmlFilterIsActive = manipulateDOM.checkHtmlFilterEnabled(initiatorDomain);
 
     injectionCount = Object.keys(registeredTab.injections).length || 0;
     missingCount = registeredTab.missing || 0;
@@ -54,7 +54,7 @@ stateManager.registerInjection = function (tabIdentifier, injection, url) {
     if (stateManager.showIconBadge === true) {
         if (missingCount > 0 && stateManager.changeBadgeColorMissingResources) {
             wrappers.setBadgeColoring(tabIdentifier, BadgeSettingMissingResource.TYPE);
-        } else if (listedToManipulateDOM) {
+        } else if (htmlFilterIsActive) {
             wrappers.setBadgeColoring(tabIdentifier, BadgeSettingHTMLFilter.TYPE);
         } else {
             wrappers.setBadgeColoring(tabIdentifier, BadgeSetting.TYPE);