diff --git a/web/viewer.css b/web/viewer.css
index 48c31ce811d11..b2ce01f33d684 100644
--- a/web/viewer.css
+++ b/web/viewer.css
@@ -1213,27 +1213,8 @@ dialog :link {
   z-index: 50000; /* should be higher than anything else in PDF.js! */
 }
 
-#secondaryToolbar {
-  background-color: var(--doorhanger-bg-color);
-  cursor: default;
-  font: message-box;
-  font-size: 12px;
-  height: auto;
-  inset-inline-end: 4px;
-  line-height: 14px;
-  margin: 4px 2px;
-  padding: 6px 0 10px;
-  position: absolute;
-  text-align: left;
-  top: var(--toolbar-height);
-  z-index: 30000;
-
-  :is(button, a) {
-    font: message-box;
-    outline: none;
-  }
-
-  .toolbarButton {
+.toolbarButton {
+  &.labeled {
     border-radius: 0;
     display: inline-block;
     height: auto;
@@ -1273,6 +1254,27 @@ dialog :link {
       padding-inline-end: 4px;
     }
   }
+}
+
+#secondaryToolbar {
+  background-color: var(--doorhanger-bg-color);
+  cursor: default;
+  font: message-box;
+  font-size: 12px;
+  height: auto;
+  inset-inline-end: 4px;
+  line-height: 14px;
+  margin: 4px 2px;
+  padding: 6px 0 10px;
+  position: absolute;
+  text-align: left;
+  top: var(--toolbar-height);
+  z-index: 30000;
+
+  :is(button, a) {
+    font: message-box;
+    outline: none;
+  }
 
   #secondaryToolbarButtonContainer {
     margin-bottom: -4px;
diff --git a/web/viewer.html b/web/viewer.html
index 423dad49a2017..fdfc12d5b4db1 100644
--- a/web/viewer.html
+++ b/web/viewer.html
@@ -227,7 +227,7 @@
 
         <div class="editorParamsToolbar hidden doorHangerRight" id="editorStampParamsToolbar">
           <div class="editorParamsToolbarContainer">
-            <button id="editorStampAddImage" class="toolbarButton" type="button" title="Add image" tabindex="108" data-l10n-id="pdfjs-editor-stamp-add-image-button">
+            <button id="editorStampAddImage" class="toolbarButton labeled" type="button" title="Add image" tabindex="108" data-l10n-id="pdfjs-editor-stamp-add-image-button">
               <span class="editorParamsLabel" data-l10n-id="pdfjs-editor-stamp-add-image-button-label">Add image</span>
             </button>
           </div>
@@ -236,16 +236,16 @@
         <div id="secondaryToolbar" class="secondaryToolbar hidden doorHangerRight">
           <div id="secondaryToolbarButtonContainer">
 <!--#if GENERIC-->
-            <button id="secondaryOpenFile" class="toolbarButton" type="button" title="Open File" tabindex="51" data-l10n-id="pdfjs-open-file-button">
+            <button id="secondaryOpenFile" class="toolbarButton labeled" type="button" title="Open File" tabindex="51" data-l10n-id="pdfjs-open-file-button">
               <span data-l10n-id="pdfjs-open-file-button-label">Open</span>
             </button>
 <!--#endif-->
 
-            <button id="secondaryPrint" class="toolbarButton visibleMediumView" type="button" title="Print" tabindex="52" data-l10n-id="pdfjs-print-button">
+            <button id="secondaryPrint" class="toolbarButton labeled visibleMediumView" type="button" title="Print" tabindex="52" data-l10n-id="pdfjs-print-button">
               <span data-l10n-id="pdfjs-print-button-label">Print</span>
             </button>
 
-            <button id="secondaryDownload" class="toolbarButton visibleMediumView" type="button" title="Save" tabindex="53" data-l10n-id="pdfjs-save-button">
+            <button id="secondaryDownload" class="toolbarButton labeled visibleMediumView" type="button" title="Save" tabindex="53" data-l10n-id="pdfjs-save-button">
               <span data-l10n-id="pdfjs-save-button-label">Save</span>
             </button>
 
@@ -255,39 +255,39 @@
 <!--        <div class="horizontalToolbarSeparator visibleMediumView"></div>-->
 <!--#endif-->
 
-            <button id="presentationMode" class="toolbarButton" type="button" title="Switch to Presentation Mode" tabindex="54" data-l10n-id="pdfjs-presentation-mode-button">
+            <button id="presentationMode" class="toolbarButton labeled" type="button" title="Switch to Presentation Mode" tabindex="54" data-l10n-id="pdfjs-presentation-mode-button">
               <span data-l10n-id="pdfjs-presentation-mode-button-label">Presentation Mode</span>
             </button>
 
-            <a href="#" id="viewBookmark" class="toolbarButton" title="Current Page (View URL from Current Page)" tabindex="55" data-l10n-id="pdfjs-bookmark-button">
+            <a href="#" id="viewBookmark" class="toolbarButton labeled" title="Current Page (View URL from Current Page)" tabindex="55" data-l10n-id="pdfjs-bookmark-button">
               <span data-l10n-id="pdfjs-bookmark-button-label">Current Page</span>
             </a>
 
             <div id="viewBookmarkSeparator" class="horizontalToolbarSeparator"></div>
 
-            <button id="firstPage" class="toolbarButton" type="button" title="Go to First Page" tabindex="56" data-l10n-id="pdfjs-first-page-button">
+            <button id="firstPage" class="toolbarButton labeled" type="button" title="Go to First Page" tabindex="56" data-l10n-id="pdfjs-first-page-button">
               <span data-l10n-id="pdfjs-first-page-button-label">Go to First Page</span>
             </button>
-            <button id="lastPage" class="toolbarButton" type="button" title="Go to Last Page" tabindex="57" data-l10n-id="pdfjs-last-page-button">
+            <button id="lastPage" class="toolbarButton labeled" type="button" title="Go to Last Page" tabindex="57" data-l10n-id="pdfjs-last-page-button">
               <span data-l10n-id="pdfjs-last-page-button-label">Go to Last Page</span>
             </button>
 
             <div class="horizontalToolbarSeparator"></div>
 
-            <button id="pageRotateCw" class="toolbarButton" type="button" title="Rotate Clockwise" tabindex="58" data-l10n-id="pdfjs-page-rotate-cw-button">
+            <button id="pageRotateCw" class="toolbarButton labeled" type="button" title="Rotate Clockwise" tabindex="58" data-l10n-id="pdfjs-page-rotate-cw-button">
               <span data-l10n-id="pdfjs-page-rotate-cw-button-label">Rotate Clockwise</span>
             </button>
-            <button id="pageRotateCcw" class="toolbarButton" type="button" title="Rotate Counterclockwise" tabindex="59" data-l10n-id="pdfjs-page-rotate-ccw-button">
+            <button id="pageRotateCcw" class="toolbarButton labeled" type="button" title="Rotate Counterclockwise" tabindex="59" data-l10n-id="pdfjs-page-rotate-ccw-button">
               <span data-l10n-id="pdfjs-page-rotate-ccw-button-label">Rotate Counterclockwise</span>
             </button>
 
             <div class="horizontalToolbarSeparator"></div>
 
             <div id="cursorToolButtons" role="radiogroup">
-              <button id="cursorSelectTool" class="toolbarButton toggled" type="button" title="Enable Text Selection Tool" tabindex="60" data-l10n-id="pdfjs-cursor-text-select-tool-button" role="radio" aria-checked="true">
+              <button id="cursorSelectTool" class="toolbarButton labeled toggled" type="button" title="Enable Text Selection Tool" tabindex="60" data-l10n-id="pdfjs-cursor-text-select-tool-button" role="radio" aria-checked="true">
                 <span data-l10n-id="pdfjs-cursor-text-select-tool-button-label">Text Selection Tool</span>
               </button>
-              <button id="cursorHandTool" class="toolbarButton" type="button" title="Enable Hand Tool" tabindex="61" data-l10n-id="pdfjs-cursor-hand-tool-button" role="radio" aria-checked="false">
+              <button id="cursorHandTool" class="toolbarButton labeled" type="button" title="Enable Hand Tool" tabindex="61" data-l10n-id="pdfjs-cursor-hand-tool-button" role="radio" aria-checked="false">
                 <span data-l10n-id="pdfjs-cursor-hand-tool-button-label">Hand Tool</span>
               </button>
             </div>
@@ -295,16 +295,16 @@
             <div class="horizontalToolbarSeparator"></div>
 
             <div id="scrollModeButtons" role="radiogroup">
-              <button id="scrollPage" class="toolbarButton" type="button" title="Use Page Scrolling" tabindex="62" data-l10n-id="pdfjs-scroll-page-button" role="radio" aria-checked="false">
+              <button id="scrollPage" class="toolbarButton labeled" type="button" title="Use Page Scrolling" tabindex="62" data-l10n-id="pdfjs-scroll-page-button" role="radio" aria-checked="false">
                 <span data-l10n-id="pdfjs-scroll-page-button-label">Page Scrolling</span>
               </button>
-              <button id="scrollVertical" class="toolbarButton toggled" type="button" title="Use Vertical Scrolling" tabindex="63" data-l10n-id="pdfjs-scroll-vertical-button" role="radio" aria-checked="true">
+              <button id="scrollVertical" class="toolbarButton labeled toggled" type="button" title="Use Vertical Scrolling" tabindex="63" data-l10n-id="pdfjs-scroll-vertical-button" role="radio" aria-checked="true">
                 <span data-l10n-id="pdfjs-scroll-vertical-button-label" >Vertical Scrolling</span>
               </button>
-              <button id="scrollHorizontal" class="toolbarButton" type="button" title="Use Horizontal Scrolling" tabindex="64" data-l10n-id="pdfjs-scroll-horizontal-button" role="radio" aria-checked="false">
+              <button id="scrollHorizontal" class="toolbarButton labeled" type="button" title="Use Horizontal Scrolling" tabindex="64" data-l10n-id="pdfjs-scroll-horizontal-button" role="radio" aria-checked="false">
                 <span data-l10n-id="pdfjs-scroll-horizontal-button-label">Horizontal Scrolling</span>
               </button>
-              <button id="scrollWrapped" class="toolbarButton" type="button" title="Use Wrapped Scrolling" tabindex="65" data-l10n-id="pdfjs-scroll-wrapped-button" role="radio" aria-checked="false">
+              <button id="scrollWrapped" class="toolbarButton labeled" type="button" title="Use Wrapped Scrolling" tabindex="65" data-l10n-id="pdfjs-scroll-wrapped-button" role="radio" aria-checked="false">
                 <span data-l10n-id="pdfjs-scroll-wrapped-button-label">Wrapped Scrolling</span>
               </button>
             </div>
@@ -312,25 +312,25 @@
             <div class="horizontalToolbarSeparator"></div>
 
             <div id="spreadModeButtons" role="radiogroup">
-              <button id="spreadNone" class="toolbarButton toggled" type="button" title="Do not join page spreads" tabindex="66" data-l10n-id="pdfjs-spread-none-button" role="radio" aria-checked="true">
+              <button id="spreadNone" class="toolbarButton labeled toggled" type="button" title="Do not join page spreads" tabindex="66" data-l10n-id="pdfjs-spread-none-button" role="radio" aria-checked="true">
                 <span data-l10n-id="pdfjs-spread-none-button-label">No Spreads</span>
               </button>
-              <button id="spreadOdd" class="toolbarButton" type="button" title="Join page spreads starting with odd-numbered pages" tabindex="67" data-l10n-id="pdfjs-spread-odd-button" role="radio" aria-checked="false">
+              <button id="spreadOdd" class="toolbarButton labeled" type="button" title="Join page spreads starting with odd-numbered pages" tabindex="67" data-l10n-id="pdfjs-spread-odd-button" role="radio" aria-checked="false">
                 <span data-l10n-id="pdfjs-spread-odd-button-label">Odd Spreads</span>
               </button>
-              <button id="spreadEven" class="toolbarButton" type="button" title="Join page spreads starting with even-numbered pages" tabindex="68" data-l10n-id="pdfjs-spread-even-button" role="radio" aria-checked="false">
+              <button id="spreadEven" class="toolbarButton labeled" type="button" title="Join page spreads starting with even-numbered pages" tabindex="68" data-l10n-id="pdfjs-spread-even-button" role="radio" aria-checked="false">
                 <span data-l10n-id="pdfjs-spread-even-button-label">Even Spreads</span>
               </button>
             </div>
 
             <div id="imageAltTextSettingsSeparator" class="horizontalToolbarSeparator hidden"></div>
-            <button id="imageAltTextSettings" type="button" class="toolbarButton hidden" title="Image alt text settings" tabindex="69" data-l10n-id="pdfjs-image-alt-text-settings-button" aria-controls="altTextSettingsDialog">
+            <button id="imageAltTextSettings" type="button" class="toolbarButton labeled hidden" title="Image alt text settings" tabindex="69" data-l10n-id="pdfjs-image-alt-text-settings-button" aria-controls="altTextSettingsDialog">
               <span data-l10n-id="pdfjs-image-alt-text-settings-button-label">Image alt text settings</span>
             </button>
 
             <div class="horizontalToolbarSeparator"></div>
 
-            <button id="documentProperties" class="toolbarButton" type="button" title="Document Properties…" tabindex="70" data-l10n-id="pdfjs-document-properties-button" aria-controls="documentPropertiesDialog">
+            <button id="documentProperties" class="toolbarButton labeled" type="button" title="Document Properties…" tabindex="70" data-l10n-id="pdfjs-document-properties-button" aria-controls="documentPropertiesDialog">
               <span data-l10n-id="pdfjs-document-properties-button-label">Document Properties…</span>
             </button>
           </div>