Bug 1701046 - Add-on install confirmation panel string should end with a period. r=mconley,flod

Differential Revision: https://phabricator.services.mozilla.com/D109929

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

@@ -185,10 +185,10 @@ webext.defaultSearchNo.accessKey=N
 webext.remove.confirmation.message=Remove %1$S from %2$S?
 webext.remove.confirmation.button=Remove
 
-# LOCALIZATION NOTE (addonPostInstall.message2)
+# LOCALIZATION NOTE (addonPostInstall.message3)
 # %S is replaced with the localized named of the extension that was
 # just installed.
-addonPostInstall.message2=%S was added
+addonPostInstall.message3=%S was added.
 
 # LOCALIZATION NOTE (addonDownloadingAndVerifying):
 # Semicolon-separated list of plural forms. See:

browser/modules/ExtensionsUI.jsm

@@ -521,7 +521,7 @@ var ExtensionsUI = {
     let { window } = getTabBrowser(target);
     let bundle = window.gNavigatorBundle;
 
-    let message = bundle.getFormattedString("addonPostInstall.message2", [
+    let message = bundle.getFormattedString("addonPostInstall.message3", [
       "<>",
     ]);
     const permissionName = "internal:privateBrowsingAllowed";