diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 978c58ac..2e2d81a8 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -8,7 +8,7 @@
 - `Fix` — Resolve compiler error from importing the BlockToolData type.
 - `Fix` — Resolved a problem when document was being scrolled to the beginning after moving up a Block above the viewport.
 - `Improvement` — Package size reduced by removing redundant files
-- `Fix`- Entire block being deleted on backspace key press when the browser has 3rd party grammer checker extension
+- `Fix`- Several bugs caused by random browser extensions
 
 ### 2.26.5
 
diff --git a/package.json b/package.json
index 30ba45d0..7c4a26bf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@editorjs/editorjs",
-  "version": "2.27.0-rc.3",
+  "version": "2.27.0-rc.4",
   "description": "Editor.js — Native JS, based on API and Open Source",
   "main": "dist/editor.js",
   "types": "./types/index.d.ts",
diff --git a/src/components/block/index.ts b/src/components/block/index.ts
index f7632936..642ed483 100644
--- a/src/components/block/index.ts
+++ b/src/components/block/index.ts
@@ -153,6 +153,11 @@ export default class Block extends EventsDispatcher<BlockEvents> {
    */
   private cachedInputs: HTMLElement[] = [];
 
+  /**
+   * We'll store a reference to the tool's rendered element to access it later
+   */
+  private toolRenderedElement: HTMLElement | null = null;
+
   /**
    * Tool class instance
    */
@@ -553,23 +558,7 @@ export default class Block extends EventsDispatcher<BlockEvents> {
    * @returns {HTMLElement}
    */
   public get pluginsContent(): HTMLElement {
-    const blockContentNodes = this.holder.querySelector(`.${Block.CSS.content}`);
-
-    if (blockContentNodes && blockContentNodes.childNodes.length) {
-      /**
-       * Editors Block content can contain different Nodes from extensions
-       * We use DOM isExtensionNode to ignore such Nodes and return first Block that does not match filtering list
-       */
-      for (let child = blockContentNodes.childNodes.length - 1; child >= 0; child--) {
-        const contentNode = blockContentNodes.childNodes[child];
-
-        if (!$.isExtensionNode(contentNode)) {
-          return contentNode as HTMLElement;
-        }
-      }
-    }
-
-    return null;
+    return this.toolRenderedElement;
   }
 
   /**
@@ -825,7 +814,12 @@ export default class Block extends EventsDispatcher<BlockEvents> {
         contentNode = $.make('div', Block.CSS.content),
         pluginsContent = this.toolInstance.render();
 
-    contentNode.appendChild(pluginsContent);
+    /**
+     * Saving a reference to plugin's content element for guaranteed accessing it later
+     */
+    this.toolRenderedElement = pluginsContent;
+
+    contentNode.appendChild(this.toolRenderedElement);
 
     /**
      * Block Tunes might wrap Block's content node to provide any UI changes
diff --git a/src/components/dom.ts b/src/components/dom.ts
index 62405423..52aff5ba 100644
--- a/src/components/dom.ts
+++ b/src/components/dom.ts
@@ -550,26 +550,6 @@ export default class Dom {
     return element;
   }
 
-  /**
-   * Method checks passed Node if it is some extension Node
-   *
-   * @param {Node} node - any node
-   * @returns {boolean}
-   */
-  public static isExtensionNode(node: Node): boolean {
-    const extensions = [
-      'grammarly-extension',
-      'mci-extension',
-      'gdiv',
-      'pwa-container-wrapper',
-      'pwa-editor-bar-cnt',
-      'editor-squiggler',
-      'quillbot-extension',
-    ];
-
-    return node && extensions.includes(node.nodeName.toLowerCase());
-  }
-
   /**
    * Returns true if element is anchor (is A tag)
    *
diff --git a/test/cypress/tests/modules/Saver.spec.ts b/test/cypress/tests/modules/Saver.spec.ts
new file mode 100644
index 00000000..7a28037d
--- /dev/null
+++ b/test/cypress/tests/modules/Saver.spec.ts
@@ -0,0 +1,37 @@
+import type EditorJS from '../../../../types/index';
+
+describe('Saver module', function () {
+  describe('save()', function () {
+    it('should correctly save block if there are some 3rd party (eg. browser extensions) nodes inserted into the layout', function () {
+      cy.createEditor({
+        data: {
+          blocks: [
+            {
+              type: 'paragraph',
+              data: {
+                text: 'The block with some text',
+              },
+            },
+          ],
+        },
+      }).then((editor: EditorJS) => {
+        /**
+         * Add some node just like browser extensions doing
+         */
+        const extensionNode = document.createElement('extension-node');
+
+        cy.get('[data-cy=editorjs]')
+          .find('.ce-block__content')
+          .then((blockContent) => {
+            blockContent.append(extensionNode);
+          })
+          .then(async () => {
+            const savedData = await editor.save();
+
+            expect(savedData.blocks.length).to.equal(1);
+            expect(savedData.blocks[0].data.text).to.equal('The block with some text');
+          });
+      });
+    });
+  });
+});