Created accounts are saved. Saved accounts are loaded automatically at startup. It is possible to delete an account. The accounts are stored in the preferences, under a messenger.account. branch. The list of accounts is in the preference messenger.accounts

im/app/profile/all-instantbird.js

@@ -4,3 +4,5 @@ pref("accessibility.browsewithcaret", true);
 
 pref("javascript.options.showInConsole", true);
 pref("javascript.options.strict", true);
+
+pref("messenger.accounts", "");

im/base/content/instantbird/account.js

@@ -82,11 +82,13 @@ var account = {
 
   getValue: function account_getValue(aId) {
     var elt = document.getElementById(aId);
+    if ("checked" in elt)
+      return elt.checked;
     return elt.value;
   },
 
   create: function account_create() {
-    var acc = this.pcs.createAccount(this.getValue("name"), this.proto);
+    var acc = this.pcs.createAccount(this.getValue("name"), this.proto.id);
     acc.password = this.getValue("password");
     
     var opts = this.proto.getOptions();
@@ -112,7 +114,7 @@ var account = {
 	throw "unknown preference type " + opt.type;
       }
     }
-   
+    acc.save();
     acc.connect();
   }
 };