diff --git a/browser/components/controlcenter/content/protectionsPanel.inc.xul b/browser/components/controlcenter/content/protectionsPanel.inc.xul
index c26074f82ad5..73853128c657 100644
--- a/browser/components/controlcenter/content/protectionsPanel.inc.xul
+++ b/browser/components/controlcenter/content/protectionsPanel.inc.xul
@@ -24,7 +24,8 @@
                role="heading" aria-level="1">
           <html:span id="protections-popup-mainView-panel-header-span"/>
         </label>
-        <toolbarbutton id="protections-popup-info-button" class="panel-info-button">
+        <toolbarbutton id="protections-popup-info-button" class="panel-info-button"
+                       aria-label="&protections.etpMoreInfo.label;">
           <image/>
         </toolbarbutton>
         <description id="protections-popup-toast-panel-tp-on-desc">&protections.etpON.header;</description>
diff --git a/browser/locales/en-US/chrome/browser/browser.dtd b/browser/locales/en-US/chrome/browser/browser.dtd
index 7f30544a8809..513a0e94899e 100644
--- a/browser/locales/en-US/chrome/browser/browser.dtd
+++ b/browser/locales/en-US/chrome/browser/browser.dtd
@@ -741,6 +741,9 @@ you can use these alternative items. Otherwise, their values should be empty.  -
 
 <!ENTITY protections.etpON.header "Enhanced Tracking Protection is ON for this site">
 <!ENTITY protections.etpOFF.header "Enhanced Tracking Protection is OFF for this site">
+<!-- LOCALIZATION NOTE:
+     protections.etpMoreInfo.label: The text a screen reader speaks when focused on the info button. -->
+<!ENTITY protections.etpMoreInfo.label "More information about Enhanced Tracking Protection">
 <!ENTITY protections.settings.label "Protection Settings">
 <!ENTITY protections.report.label "Show Full Report">
 <!-- LOCALIZATION NOTE: