diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index 9c93fbda8e..1940703979 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -963,3 +963,5 @@ firstRunGuidance.saveIcon		= Zotero has found a reference on this page. Click th
 firstRunGuidance.authorMenu		= Zotero lets you specify editors and translators, too. You can turn an author into an editor or translator by selecting from this menu.
 firstRunGuidance.quickFormat	= Type a title or author to search for a reference.\n\nAfter you've made your selection, click the bubble or press Ctrl-\u2193 to add page numbers, prefixes, or suffixes. You can also include a page number along with your search terms to add it directly.\n\nYou can edit citations directly in the word processor document.
 firstRunGuidance.quickFormatMac	= Type a title or author to search for a reference.\n\nAfter you've made your selection, click the bubble or press Cmd-\u2193 to add page numbers, prefixes, or suffixes. You can also include a page number along with your search terms to add it directly.\n\nYou can edit citations directly in the word processor document.
+firstRunGuidance.toolbarButton.upgrade	= The Zotero icon can now be found in the Firefox toolbar. Click here to open Zotero, or use the %S keyboard shortcut.
+firstRunGuidance.toolbarButton.new	    = The Zotero icon can be found in the Firefox toolbar. Click here to open Zotero, or use the %S keyboard shortcut.