diff --git a/dev/Common/Html.js b/dev/Common/Html.js
index b2d929afa..08dc2b559 100644
--- a/dev/Common/Html.js
+++ b/dev/Common/Html.js
@@ -721,168 +721,7 @@ export const
 			.replace(/\n/g, '<br>');
 		blockquoteSwitcher();
 		return tmpl.innerHTML.trim();
-	},
-
-	WYSIWYGS = ko.observableArray();
-
-WYSIWYGS.push({
-	name: 'Squire',
-	construct: (owner, container, onReady) => onReady(new SquireUI(container))
-});
-
-rl.registerWYSIWYG = (name, construct) => WYSIWYGS.push({name, construct});
-
-export class HtmlEditor {
-	/**
-	 * @param {Object} element
-	 * @param {Function=} onBlur
-	 * @param {Function=} onReady
-	 * @param {Function=} onModeChange
-	 */
-	constructor(element, onReady = null, onModeChange = null, onBlur = null) {
-		this.blurTimer = 0;
-
-		this.onBlur = onBlur;
-		this.onModeChange = onModeChange;
-
-		if (element) {
-			onReady = onReady ? [onReady] : [];
-			this.onReady = fn => onReady.push(fn);
-			// TODO: make 'which' user configurable
-			const which = SettingsUserStore.editorWysiwyg(),
-				wysiwyg = WYSIWYGS.find(item => which == item.name) || WYSIWYGS.find(item => 'Squire' == item.name);
-//			const wysiwyg = WYSIWYGS.find(item => 'Squire' == item.name);
-			wysiwyg.construct(this, element, editor => setTimeout(()=>{
-				this.editor = editor;
-				editor.on('blur', () => this.blurTrigger());
-				editor.on('focus', () => clearTimeout(this.blurTimer));
-				editor.on('mode', () => {
-					this.blurTrigger();
-					this.onModeChange?.(!this.isPlain());
-				});
-				this.onReady = fn => fn();
-				onReady.forEach(fn => fn());
-			},1));
-		}
-	}
-
-	blurTrigger() {
-		if (this.onBlur) {
-			clearTimeout(this.blurTimer);
-			this.blurTimer = setTimeout(() => this.onBlur?.(), 200);
-		}
-	}
-
-	/**
-	 * @returns {boolean}
-	 */
-	isHtml() {
-		return this.editor ? !this.isPlain() : false;
-	}
-
-	/**
-	 * @returns {boolean}
-	 */
-	isPlain() {
-		return this.editor ? 'plain' === this.editor.mode : false;
-	}
-
-	/**
-	 * @returns {void}
-	 */
-	clearCachedSignature() {
-		this.onReady(() => this.editor.execCommand('insertSignature', {
-			clearCache: true
-		}));
-	}
-
-	/**
-	 * @param {string} signature
-	 * @param {bool} html
-	 * @param {bool} insertBefore
-	 * @returns {void}
-	 */
-	setSignature(signature, html, insertBefore = false) {
-		this.onReady(() => this.editor.execCommand('insertSignature', {
-			isHtml: html,
-			insertBefore: insertBefore,
-			signature: signature
-		}));
-	}
-
-	/**
-	 * @param {boolean=} wrapIsHtml = false
-	 * @returns {string}
-	 */
-	getData() {
-		let result = '';
-		if (this.editor) {
-			try {
-				if (this.isPlain()) {
-					result = this.editor.getPlainData();
-				} else {
-					result = this.editor.getData();
-				}
-			} catch (e) {} // eslint-disable-line no-empty
-		}
-		return result;
-	}
-
-	/**
-	 * @returns {string}
-	 */
-	getDataWithHtmlMark() {
-		return (this.isHtml() ? ':HTML:' : '') + this.getData();
-	}
-
-	modeWysiwyg() {
-		this.onReady(() => this.editor.setMode('wysiwyg'));
-	}
-	modePlain() {
-		this.onReady(() => this.editor.setMode('plain'));
-	}
-
-	setHtmlOrPlain(text) {
-		text.startsWith(':HTML:')
-			? this.setHtml(text.slice(6))
-			: this.setPlain(text);
-	}
-
-	setData(mode, data) {
-		this.onReady(() => {
-			const editor = this.editor;
-			this.clearCachedSignature();
-			try {
-				editor.setMode(mode);
-				if (this.isPlain()) {
-					editor.setPlainData(data);
-				} else {
-					editor.setData(data);
-				}
-			} catch (e) { console.error(e); }
-		});
-	}
-
-	setHtml(html) {
-		this.setData('wysiwyg', html/*.replace(/<p[^>]*><\/p>/gi, '')*/);
-	}
-
-	setPlain(txt) {
-		this.setData('plain', txt);
-	}
-
-	focus() {
-		this.onReady(() => this.editor.focus());
-	}
-
-	blur() {
-		this.onReady(() => this.editor.blur());
-	}
-
-	clear() {
-		this.onReady(() => this.isPlain() ? this.setPlain('') : this.setHtml(''));
-	}
-}
+	};
 
 rl.Utils = {
 	htmlToPlain: htmlToPlain,
diff --git a/dev/Common/HtmlEditor.js b/dev/Common/HtmlEditor.js
new file mode 100644
index 000000000..0bbfdbdea
--- /dev/null
+++ b/dev/Common/HtmlEditor.js
@@ -0,0 +1,163 @@
+import { SettingsUserStore } from 'Stores/User/Settings';
+
+export const
+	WYSIWYGS = ko.observableArray();
+
+WYSIWYGS.push({
+	name: 'Squire',
+	construct: (owner, container, onReady) => onReady(new SquireUI(container))
+});
+
+rl.registerWYSIWYG = (name, construct) => WYSIWYGS.push({name, construct});
+
+export class HtmlEditor {
+	/**
+	 * @param {Object} element
+	 * @param {Function=} onBlur
+	 * @param {Function=} onReady
+	 * @param {Function=} onModeChange
+	 */
+	constructor(element, onReady = null, onModeChange = null, onBlur = null) {
+		this.blurTimer = 0;
+
+		this.onBlur = onBlur;
+		this.onModeChange = onModeChange;
+
+		if (element) {
+			onReady = onReady ? [onReady] : [];
+			this.onReady = fn => onReady.push(fn);
+			// TODO: make 'which' user configurable
+			const which = SettingsUserStore.editorWysiwyg(),
+				wysiwyg = WYSIWYGS.find(item => which == item.name) || WYSIWYGS.find(item => 'Squire' == item.name);
+//			const wysiwyg = WYSIWYGS.find(item => 'Squire' == item.name);
+			wysiwyg.construct(this, element, editor => setTimeout(()=>{
+				this.editor = editor;
+				editor.on('blur', () => this.blurTrigger());
+				editor.on('focus', () => clearTimeout(this.blurTimer));
+				editor.on('mode', () => {
+					this.blurTrigger();
+					this.onModeChange?.(!this.isPlain());
+				});
+				this.onReady = fn => fn();
+				onReady.forEach(fn => fn());
+			},1));
+		}
+	}
+
+	blurTrigger() {
+		if (this.onBlur) {
+			clearTimeout(this.blurTimer);
+			this.blurTimer = setTimeout(() => this.onBlur?.(), 200);
+		}
+	}
+
+	/**
+	 * @returns {boolean}
+	 */
+	isHtml() {
+		return this.editor ? !this.isPlain() : false;
+	}
+
+	/**
+	 * @returns {boolean}
+	 */
+	isPlain() {
+		return this.editor ? 'plain' === this.editor.mode : false;
+	}
+
+	/**
+	 * @returns {void}
+	 */
+	clearCachedSignature() {
+		this.onReady(() => this.editor.execCommand('insertSignature', {
+			clearCache: true
+		}));
+	}
+
+	/**
+	 * @param {string} signature
+	 * @param {bool} html
+	 * @param {bool} insertBefore
+	 * @returns {void}
+	 */
+	setSignature(signature, html, insertBefore = false) {
+		this.onReady(() => this.editor.execCommand('insertSignature', {
+			isHtml: html,
+			insertBefore: insertBefore,
+			signature: signature
+		}));
+	}
+
+	/**
+	 * @param {boolean=} wrapIsHtml = false
+	 * @returns {string}
+	 */
+	getData() {
+		let result = '';
+		if (this.editor) {
+			try {
+				if (this.isPlain()) {
+					result = this.editor.getPlainData();
+				} else {
+					result = this.editor.getData();
+				}
+			} catch (e) {} // eslint-disable-line no-empty
+		}
+		return result;
+	}
+
+	/**
+	 * @returns {string}
+	 */
+	getDataWithHtmlMark() {
+		return (this.isHtml() ? ':HTML:' : '') + this.getData();
+	}
+
+	modeWysiwyg() {
+		this.onReady(() => this.editor.setMode('wysiwyg'));
+	}
+	modePlain() {
+		this.onReady(() => this.editor.setMode('plain'));
+	}
+
+	setHtmlOrPlain(text) {
+		text.startsWith(':HTML:')
+			? this.setHtml(text.slice(6))
+			: this.setPlain(text);
+	}
+
+	setData(mode, data) {
+		this.onReady(() => {
+			const editor = this.editor;
+			this.clearCachedSignature();
+			try {
+				editor.setMode(mode);
+				if (this.isPlain()) {
+					editor.setPlainData(data);
+				} else {
+					editor.setData(data);
+				}
+			} catch (e) { console.error(e); }
+		});
+	}
+
+	setHtml(html) {
+		this.setData('wysiwyg', html/*.replace(/<p[^>]*><\/p>/gi, '')*/);
+	}
+
+	setPlain(txt) {
+		this.setData('plain', txt);
+	}
+
+	focus() {
+		this.onReady(() => this.editor.focus());
+	}
+
+	blur() {
+		this.onReady(() => this.editor.blur());
+	}
+
+	clear() {
+		this.onReady(() => this.isPlain() ? this.setPlain('') : this.setHtml(''));
+	}
+}
diff --git a/dev/External/User/ko.js b/dev/External/User/ko.js
index 7affba8d5..78dc965eb 100644
--- a/dev/External/User/ko.js
+++ b/dev/External/User/ko.js
@@ -1,7 +1,7 @@
 import 'External/ko';
 import ko from 'ko';
 import { RFC822 } from 'Common/File';
-import { HtmlEditor } from 'Common/Html';
+import { HtmlEditor } from 'Common/HtmlEditor';
 import { timeToNode } from 'Common/Translator';
 import { doc, elementById, addEventsListeners, dropdowns, leftPanelDisabled } from 'Common/Globals';
 import { EmailAddressesComponent } from 'Component/EmailAddresses';
diff --git a/dev/Settings/User/General.js b/dev/Settings/User/General.js
index 3c2584c5b..cb1cdc73b 100644
--- a/dev/Settings/User/General.js
+++ b/dev/Settings/User/General.js
@@ -5,7 +5,7 @@ import { SaveSettingStatus } from 'Common/Enums';
 import { LayoutSideView, LayoutBottomView } from 'Common/EnumsUser';
 import { setRefreshFoldersInterval } from 'Common/Folders';
 import { Settings, SettingsGet } from 'Common/Globals';
-import { WYSIWYGS } from 'Common/Html';
+import { WYSIWYGS } from 'Common/HtmlEditor';
 import { isArray } from 'Common/Utils';
 import { addSubscribablesTo, addComputablesTo } from 'External/ko';
 import { i18n, translateTrigger, translatorReload, convertLangName } from 'Common/Translator';
diff --git a/dev/View/Popup/Compose.js b/dev/View/Popup/Compose.js
index 336e33f94..35a33fc1f 100644
--- a/dev/View/Popup/Compose.js
+++ b/dev/View/Popup/Compose.js
@@ -11,7 +11,8 @@ import {
 } from 'Common/EnumsUser';
 
 import { pInt, isArray, arrayLength, b64Encode } from 'Common/Utils';
-import { encodeHtml, HtmlEditor, htmlToPlain } from 'Common/Html';
+import { encodeHtml, htmlToPlain } from 'Common/Html';
+import { HtmlEditor } from 'Common/HtmlEditor';
 import { koArrayWithDestroy, addObservablesTo, addComputablesTo, addSubscribablesTo } from 'External/ko';
 
 import { UNUSED_OPTION_VALUE } from 'Common/Consts';