Bug 1595656 - isUserFacingLogin should only exclude the FxA one, not legacy extension ones. r=sfoster

We shouldn't hide data saved by legacy extensions, the user should remain in control of them since they may contain credentials they want to delete.

Differential Revision: https://phabricator.services.mozilla.com/D53833

--HG--
extra : moz-landing-system : lando

toolkit/components/passwordmgr/LoginHelper.jsm

@@ -1105,7 +1105,7 @@ this.LoginHelper = {
   },
 
   isUserFacingLogin(login) {
-    return !login.origin.startsWith("chrome://");
+    return login.origin != "chrome://FirefoxAccounts"; // FXA_PWDMGR_HOST
   },
 
   async getAllUserFacingLogins() {