diff --git a/browser/locales/en-US/chrome/browser/browser.properties b/browser/locales/en-US/chrome/browser/browser.properties
index a1529e2d1f45..960a8ca694b4 100644
--- a/browser/locales/en-US/chrome/browser/browser.properties
+++ b/browser/locales/en-US/chrome/browser/browser.properties
@@ -141,6 +141,33 @@ updatesItem_pending=Apply Downloaded Update Now…
 updatesItem_pendingFallback=Apply Downloaded Update Now…
 updatesItem_pending.accesskey=D
 
+# Check for Updates in the About Dialog - button labels and accesskeys
+# LOCALIZATION NOTE - all of the following update buttons and labels will only
+# be displayed one at a time. So, if a button is displayed no other buttons or
+# labels will be displayed and if a label is displayed no other buttons or
+# labels will be displayed. They will be placed directly under the Firefox
+# version in the about dialog.
+update.checkButton.label=Check for Updates…
+update.checkButton.accesskey=C
+update.resumeButton.label=Resume Downloading %S…
+update.resumeButton.accesskey=D
+update.openUpdateUI.applyButton.label=Apply Update…
+update.openUpdateUI.applyButton.accesskey=A
+update.restart.applyButton.label=Apply Update
+update.restart.applyButton.accesskey=A
+update.openUpdateUI.upgradeButton.label=Upgrade Now…
+update.openUpdateUI.upgradeButton.accesskey=U
+update.restart.upgradeButton.label=Upgrade Now
+update.restart.upgradeButton.accesskey=U
+# Check for Updates in the About Dialog - status labels
+update.checkingForUpdate.label=Checking for updates…
+update.checkingAddonCompat.label=Checking add-on compatibility…
+update.noUpdateFound.label=This is the latest available version
+# LOCALIZATION NOTE (update.downloading) — is the "em dash" (long dash)
+# %S is the amount download
+# examples: Downloading update — 111 KB of 13 MB
+update.downloading=Downloading update — %S
+
 # RSS Pretty Print
 feedShowFeedNew=Subscribe to '%S'…