Bug 1344214 Update button in addon install doorhanger r=flod

MozReview-Commit-ID: 7bpbpNUfi5h

--HG--
extra : rebase_source : df01c69be1a7f0ff621445de244dda871f2b9890

browser/base/content/browser-addons.js

@@ -183,8 +183,8 @@ const gXPInstallObserver = {
     messageString = messageString.replace("#2", installInfo.installs.length);
 
     let action = {
-      label: gNavigatorBundle.getString("addonInstall.acceptButton.label"),
-      accessKey: gNavigatorBundle.getString("addonInstall.acceptButton.accesskey"),
+      label: gNavigatorBundle.getString("addonInstall.acceptButton2.label"),
+      accessKey: gNavigatorBundle.getString("addonInstall.acceptButton2.accesskey"),
       callback: acceptInstallation,
     };
 
@@ -338,8 +338,8 @@ const gXPInstallObserver = {
         }
       };
       action = {
-        label: gNavigatorBundle.getString("addonInstall.acceptButton.label"),
-        accessKey: gNavigatorBundle.getString("addonInstall.acceptButton.accesskey"),
+        label: gNavigatorBundle.getString("addonInstall.acceptButton2.label"),
+        accessKey: gNavigatorBundle.getString("addonInstall.acceptButton2.accesskey"),
         callback: () => {},
       };
       let secondaryAction = {

browser/locales/en-US/chrome/browser/browser.properties

@@ -161,8 +161,8 @@ addonDownloadVerifying=Verifying
 addonInstall.unsigned=(Unverified)
 addonInstall.cancelButton.label=Cancel
 addonInstall.cancelButton.accesskey=C
-addonInstall.acceptButton.label=Install
-addonInstall.acceptButton.accesskey=I
+addonInstall.acceptButton2.label=Add
+addonInstall.acceptButton2.accesskey=A
 
 # LOCALIZATION NOTE (addonConfirmInstallMessage,addonConfirmInstallUnsigned):
 # Semicolon-separated list of plural forms. See: