Updated extensions:

 * Upgraded Privacy Redirect to 1.1.49 and configured to use the 10 most reliable invidious instances
 * Removed ViewTube
 * Added torproxy@icecat.gnu based on 'Proxy toggle' extension
 * Added jShelter 0.11.1
 * Upgraded LibreJS to 7.21.0
 * Upgraded HTTPS Everywhere to 2021.7.13
 * Upgraded SubmitMe to 1.9

1 files changed, 107 insertions, 0 deletions

diff --git a/data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js b/data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js
new file mode 100644
index 0000000..2df5996
--- /dev/null
+++ b/data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js
@@ -0,0 +1,107 @@
+/** \file
+ * \brief Wrappers for navigator.deviceMemory property
+ *
+ * \see https://xhr.spec.whatwg.org/
+ *
+ *  \author Copyright (C) 2019  Libor Polcak
+ *  \author Copyright (C) 2021  Matus Svancar
+ *
+ *  \license SPDX-License-Identifier: GPL-3.0-or-later
+ *  \license SPDX-License-Identifier: MPL-2.0
+ */
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+//  Alternatively, the contents of this file may be used under the terms
+//  of the Mozilla Public License, v. 2.0, as described below:
+//
+//  This Source Code Form is subject to the terms of the Mozilla Public
+//  License, v. 2.0. If a copy of the MPL was not distributed with this file,
+//  You can obtain one at http://mozilla.org/MPL/2.0/.
+//
+//  \copyright Copyright (c) 2020 The Brave Authors.
+
+/** \file
+ * This file contains a wrapper for [navigator.deviceMemory](https://developer.mozilla.org/en-US/docs/Web/API/Navigator/deviceMemory).
+ * \ingroup wrappers
+ *
+ * The goal is to prevent fingerprinting by modifying the return value of the `navigator.deviceMemory` parameter.
+ *
+ * This wrapper operates with three levels of protection:
+ *
+ *	* (0) - return random valid value from range [0.25 - real value]
+ *	* (1) - return random valid value from range [0.25 - 8]
+ *	* (2) - return 4
+ *
+ * These approaches are inspired by the algorithms created by [Brave Software](https://brave.com)
+ * available [here](https://github.com/brave/brave-core/blob/master/chromium_src/third_party/blink/renderer/core/frame/navigator_device_memory.cc).
+ *
+ */
+
+/*
+ * Create private namespace
+ */
+(function() {
+	var wrappers = [
+		{
+			parent_object: "Navigator.prototype",
+			parent_object_property: "deviceMemory",
+			wrapped_objects: [],
+			helping_code: `
+				let dm_prng = alea(domainHash, "navigator.deviceMemory");
+				var validValues = [0.25, 0.5, 1.0, 2.0, 4.0, 8.0];
+				var ret = 4;
+				var realValue = navigator.deviceMemory;
+				if(args[0]!=2 && realValue==0.25){
+					ret = realValue;
+				}
+				else if(args[0]==0){
+					var maxIndex = validValues.indexOf(realValue);
+					if(maxIndex == -1){
+						maxIndex = validValues.length-1;
+					}
+					ret = validValues[Math.floor((dm_prng()*(maxIndex+1)))];
+				}
+				else if(args[0]==1){
+					ret = validValues[Math.floor(dm_prng()*(validValues.length))];
+				}
+			`,
+			post_wrapping_code: [
+				{
+					code_type: "object_properties",
+					parent_object: "Navigator.prototype",
+					parent_object_property: "deviceMemory",
+					wrapped_objects: [],
+					/**  \brief replaces navigator.deviceMemory getter
+					 *
+					 * Depending on level chosen this property returns:
+					 *	* (0) - random valid value from range [0.25 - real value]
+					 *	* (1) - random valid value from range [0.25 - 8]
+					 *	* (2) - 4
+					 */
+					wrapped_properties: [
+						{
+							property_name: "get",
+							property_value: `
+								function() {
+									return ret;
+								}`,
+						},
+					],
+				}
+			],
+		},
+	]
+	add_wrappers(wrappers);
+})();