diff --git a/ElectronClient/app/gui/NoteRevisionViewer.jsx b/ElectronClient/app/gui/NoteRevisionViewer.jsx
index 61e787475..a1e5d78d4 100644
--- a/ElectronClient/app/gui/NoteRevisionViewer.jsx
+++ b/ElectronClient/app/gui/NoteRevisionViewer.jsx
@@ -10,7 +10,7 @@ const urlUtils = require('lib/urlUtils');
 const Setting = require('lib/models/Setting');
 const RevisionService = require('lib/services/RevisionService');
 const shared = require('lib/components/shared/note-screen-shared.js');
-const { MarkupToHtml } = require('joplin-renderer');
+const { MarkupToHtml, assetsToHeaders } = require('joplin-renderer');
 const { time } = require('lib/time-utils.js');
 const ReactTooltip = require('react-tooltip');
 const { urlDecode, substrWithEllipsis } = require('lib/string-utils');
@@ -127,7 +127,11 @@ class NoteRevisionViewerComponent extends React.PureComponent {
 			postMessageSyntax: 'ipcProxySendToHost',
 		});
 
-		this.viewerRef_.current.wrappedInstance.send('setHtml', result.html, { cssFiles: result.cssFiles, pluginAssets: result.pluginAssets });
+		this.viewerRef_.current.wrappedInstance.send('setHtml', result.html, {
+			cssFiles: result.cssFiles,
+			pluginAssets: result.pluginAssets,
+			pluginAssetsHeadersHtml: assetsToHeaders(result.pluginAssets),
+		});
 	}
 
 	async webview_ipcMessage(event) {
@@ -196,7 +200,7 @@ class NoteRevisionViewerComponent extends React.PureComponent {
 			</div>
 		);
 
-		const viewer = <NoteTextViewer viewerStyle={{ display: 'flex', flex: 1 }} ref={this.viewerRef_} onDomReady={this.viewer_domReady} onIpcMessage={this.webview_ipcMessage} />;
+		const viewer = <NoteTextViewer viewerStyle={{ display: 'flex', flex: 1, borderLeft: 'none' }} ref={this.viewerRef_} onDomReady={this.viewer_domReady} onIpcMessage={this.webview_ipcMessage} />;
 
 		return (
 			<div style={style.root}>
diff --git a/ElectronClient/app/gui/note-viewer/index.html b/ElectronClient/app/gui/note-viewer/index.html
index 25fa2ed81..634eccd6a 100644
--- a/ElectronClient/app/gui/note-viewer/index.html
+++ b/ElectronClient/app/gui/note-viewer/index.html
@@ -142,9 +142,11 @@
 				}, 1);
 			}
 
-			const pluginAssetsContainer = document.createElement('div');
-			pluginAssetsContainer.innerHTML = event.options.pluginAssetsHeadersHtml;
-			document.getElementById('joplin-container-styleContainer').appendChild(pluginAssetsContainer);
+			if (event.options.pluginAssetsHeadersHtml) {
+				const pluginAssetsContainer = document.createElement('div');
+				pluginAssetsContainer.innerHTML = event.options.pluginAssetsHeadersHtml;
+				document.getElementById('joplin-container-styleContainer').appendChild(pluginAssetsContainer);
+			}
 
 			if (event.options.downloadResources === 'manual') {
 				webviewLib.setupResourceManualDownload();
diff --git a/readme/markdown.md b/readme/markdown.md
index 36a187d22..dee490d11 100644
--- a/readme/markdown.md
+++ b/readme/markdown.md
@@ -127,7 +127,7 @@ Joplin supports a number of plugins that can be toggled on top the standard Mark
 | [Sub](https://github.com/markdown-it/markdown-it-sub) | `X~1~` | Transforms into X<sub>1</sub> | no |
 | [Sup](https://github.com/markdown-it/markdown-it-sup) | `X^2^` | Transforms into X<sup>2</sup> | no |
 | [Deflist](https://github.com/markdown-it/markdown-it-deflist) | See [pandoc](http://johnmacfarlane.net/pandoc/README.html#definition-lists) page for syntax | Adds the html `<dl>` tag accessible through markdown | no |
-| [Abbr](https://github.com/markdown-it/markdown-it-abbr) | *[HTML]: Hyper Text Markup Language | Allows definition of abbreviations that can be hovered over later for a full expansion | no |
+| [Abbr](https://github.com/markdown-it/markdown-it-abbr) | *[HTML]: Hyper Text Markup Language<br/>The HTML specification | Allows definition of abbreviations that can be hovered over later for a full expansion | no |
 | [Emoji](https://github.com/markdown-it/markdown-it-emoji) | `:smile:` | Transforms into 😄. See [this list](https://gist.github.com/rxaviers/7360908) for more emojis | no |
 | [Insert](https://github.com/markdown-it/markdown-it-ins) | `++inserted++` | Transforms into `<ins>inserted</ins>` (<ins>inserted</ins>) | no |
 | [Multitable](https://github.com/RedBug312/markdown-it-multimd-table) | See [MultiMarkdown](https://fletcher.github.io/MultiMarkdown-6/syntax/tables.html) page | Adds more power and customization to markdown tables | no |