diff --git a/browser/devtools/styleinspector/StyleInspector.jsm b/browser/devtools/styleinspector/StyleInspector.jsm
index 663ee442a6fc..9cf3a1ab4572 100644
--- a/browser/devtools/styleinspector/StyleInspector.jsm
+++ b/browser/devtools/styleinspector/StyleInspector.jsm
@@ -82,7 +82,7 @@ StyleInspector.prototype = {
       this.registrationObject = {
         id: "styleinspector",
         label: this.l10n("style.highlighter.button.label2"),
-        tooltiptext: this.l10n("style.highlighter.button.tooltip"),
+        tooltiptext: this.l10n("style.highlighter.button.tooltip2"),
         accesskey: this.l10n("style.highlighter.accesskey2"),
         context: this,
         get isOpen() isOpen(),
diff --git a/browser/locales/en-US/chrome/browser/devtools/styleinspector.properties b/browser/locales/en-US/chrome/browser/devtools/styleinspector.properties
index 4ca9e7150dd0..baa89145c3cd 100644
--- a/browser/locales/en-US/chrome/browser/devtools/styleinspector.properties
+++ b/browser/locales/en-US/chrome/browser/devtools/styleinspector.properties
@@ -37,7 +37,7 @@ rule.inheritedSource=Inherited from %S (%S)
 # "Computed" refers to the Computed Style of the element.
 style.highlighter.button.label2=Computed
 style.highlighter.accesskey2=C
-style.highlighter.button.tooltip=Inspect element computed styles
+style.highlighter.button.tooltip2=Inspect element computed styles
 
 # LOCALIZATION NOTE (helpLinkTitle): For each style property
 # the user can hover it and get a help link button which allows one to