Import Tycho's Add-on Manager

toolkit/locales/en-US/chrome/mozapps/extensions/update.properties

@@ -0,0 +1,21 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+mismatchCheckNow=Check Now
+mismatchCheckNowAccesskey=C
+mismatchDontCheck=Don't Check
+mismatchDontCheckAccesskey=D
+installButtonText=Install Now
+installButtonTextAccesskey=I
+nextButtonText=Next >
+nextButtonTextAccesskey=N
+cancelButtonText=Cancel
+cancelButtonTextAccesskey=C
+statusPrefix=Finished checking %S
+downloadingPrefix=Downloading: %S
+installingPrefix=Installing: %S
+closeButton=Close
+installErrors=%S was unable to install updates for the following add-ons:
+checkingErrors=%S was unable to check for updates for the following add-ons:
+installErrorItemFormat=%S (%S)