Fix application name replacement from bug 552965

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

@@ -52,7 +52,7 @@ addonInstallManage.accesskey=O
 addonError-1=The add-on could not be downloaded because of a connection failure on #2.
 addonError-2=The add-on from #2 could not be installed because it does not match the add-on #3 expected.
 addonError-3=The add-on downloaded from #2 could not be installed because it appears to be corrupt.
-addonError-4=#1 could not be installed because Firefox cannot modify the needed file.
+addonError-4=#1 could not be installed because #3 cannot modify the needed file.
 addonErrorIncompatible=#1 could not be installed because it is not compatible with #3 #4.
 addonErrorBlocklisted=#1 could not be installed because it has a high risk of causing stability or security problems.