The Tor Browser: xpcom/base/nsIMutable.idl@129ffea94266

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsISupports.idl"

     8 /**

     9  * nsIMutable defines an interface to be implemented by objects which

    10  * can be made immutable.

    11  */

    12 [scriptable, uuid(321578d0-03c1-4d95-8821-021ac612d18d)]

    13 interface nsIMutable : nsISupports

    14 {

    15     /**

    16      * Control whether or not this object can be modified.  If the flag is

    17      * false, no modification is allowed.  Once the flag has been set to false,

    18      * it cannot be reset back to true -- attempts to do so throw

    19      * NS_ERROR_INVALID_ARG.

    20      */

    21     attribute boolean mutable;

    22 };

The Tor Browser / file revision

xpcom/base/nsIMutable.idl@129ffea94266

xpcom/base/nsIMutable.idl