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-<!--
- Copyright 2016 Soren Stoutner <soren@stoutner.com>.
-
- This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
-
- Privacy Browser 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.
-
- Privacy Browser 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 Privacy Browser. If not, see <http://www.gnu.org/licenses/>. -->
-
-<html>
-<head>
-<!-- We have to make an image into its own block to center it. -->
-<style>
- h3 {
- color: 0D4781;
- }
-
- img.center {
- display: block;
- margin-left: auto;
- margin-right: auto;
- }
-</style>
-</head>
-
-<body>
-<h3>Browser Identification</h3>
-
-<p>When web browsers connect to websites, they send a user agent, which identifies the browser and the
- rendering capabilities it possesses. They website can use this information to decide which version of the
- website to send to the browser. For example, many websites have different versions for desktop and
- mobile browsers.</p>
-
-<p>By default, Privacy Browser uses the built-in user agent that comes with the WebView installed on the
- device. You can see what it is by going to the <strong>Settings</strong> screen and setting the <strong>User
- agent</strong> to <strong>WebView Default</strong>. The screenshot below shows a Nexus 6P running Android 6.0.1
- with Android System WebView 51.0.2704.81 installed.</p>
-
-<img class="center" src="images/user_agent.png" height="640" width="360">
-
-<p>There is enough information in the user agent that someitmes only a few visitors to a website will be the same. If the user agent
- is combined with another piece of non-unique identifying information, often it results in a unique fingerprint.
- The Electronic Frontier Foundation created a tool called <a href="https://panopticlick.eff.org/">Panopticlick</a>
- to demonstrate how much information can be gleaned from these sources. If this test is run with JavaScript enabled the
- amount of information that is disclosed increases greatly. <a href="https://amiunique.org/">amiunique.org</a> and
- <a href="https://ip-check.info">IP Check</a> are also good sources of information.</p>
-
-<img class="center" src="images/panopticlick.png" height=640" width="360">
-
-<p>Privacy Browser allows you to change the user agent. There are several preset options that match common browsers and operating systems.
- Privacy Browser also has its own user agent, which is simply PrivacyBrowser/1.0. For tracking purposes, anything that is rare is easier
- to track. If Privacy Browser becomes common and many people use PrivacyBrowser/1.0 as their user agent, it will be a good choice for privacy.
- For now, choosing something that has lots of hits on a web server, like <strong>Edge 13 on Windows 10</strong>, allows the device to
- blend in with the crowd. Firefox or Chrome provide less privacy because they auto-update and their version numbers change so quickly
- that it is likely the user agents included in Privacy Browser will often be out of step with the majority of user agents in the
- server logs.</p>
-
-<p>A second reason to change the user agent is to convince the web server to send the desktop version of the web page, which often works
- better on modern smart phones than the mobile version. For this purpose, PrivacyBrowser/1.0 works well, because web servers typically
- default to the desktop version unless they recognize a phone browser agent.</p>
-
-<p>Android's WebView does not allow the user agent to be blank. If it is, WebView simply sends the default user-agent to the server.</p>
-</body>
-</html>
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