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-<!--
- Copyright © 2016-2017 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>
- <meta charset="UTF-8">
- <style>
- h3 {
- color: 0D4781;
- }
-
- img.title {
- vertical-align: bottom;
- height: 32;
- width: 32;
- }
- </style>
- </head>
-
- <body>
- <h3><img class="title" src="../en/images/cookie_dark_blue.png"> First-Party Cookies</h3>
-
- <p>First-party cookies are set by the website in the URL bar at the top of the page.</p>
-
- <p>From the early days of the internet, it became obvious that it would be advantageous for websites to be able to store
- information on a computer for future access. For example, a website that displays weather information could ask the
- user for a zip code, and then store it in a cookie. The next time the user visited the website, weather information
- would automatically load for that zip code, without the user having to enter the zip code, and without the need for
- the user to create an account on the website (which would be overkill for such a simple task).</p>
-
- <p>Like everything else on the web, clever people figured out all types of ways to abuse cookies to do things that users
- would not approve of if they knew they were happening. For example, a website can set a cookie with a unique serial
- number on a device. Then, every time a user visits the website on that device, it can be linked to a unique profile
- the server maintains for that serial number, even if the device connects from different IP addresses, as cell phones often do.</p>
-
- <p>Many websites with logins require first-party cookies to be enabled for a user to stay logged in. Cookies aren’t the only way
- a website can maintain a user logged in as they move from page to page on the site, but if a particular website has chosen to
- implement logins in that way, enabling first-party cookies on that site will be the only way to use the functionality.</p>
-
- <p>If first-party cookies are enabled but JavaScript is disabled, the privacy icon will be yellow <img src="images/warning.png" height="16" width="16">
- as a warning.</p>
-
-
- <h3><img class="title" src="../en/images/cookie_dark_blue.png"> Third-Party Cookies</h3>
-
- <p>Third-party cookies are set by portions of a website that are loaded from servers different from the URL at the top of the page.
- For example, most website that have advertisements load them from a third-party ad broker, like Google’s
- <a href="https://www.google.com/adsense/start/#?modal_active=none">Ad Sense</a>. Every time the website loads, it requests the ad
- broker to display an ad. The ad broker analyzes any information they may have about the user, looks at the current
- rate advertisers are willing to pay for their ads, and selects the one to display. The section of the website that displays
- the ads is loaded from the third-party broker’s server instead of the main server.</p>
-
- <p>Because most of the advertisements on the internet are processed by only a few brokers, it didn’t take long for them to realize
- that they could set a tracking cookie on the user’s device and know every place that user goes. Every time an ad loads from a broker,
- the first thing it does it check to see if if the device already has a unique serial number in a tracking cookie. If it does, it looks up
- the profile for that serial number and makes a note of the new site. This is why a user can do a search on one website for a
- product they typically don’t look for, like walnuts, and then suddenly start seeing advertisements for walnuts on every
- website they visit.</p>
-
- <p>In addition to ad brokers, social media sites discovered they could get in on the action. A few years ago, the major social media sites
- like Facebook and Twitter convinced a large number of websites that it would be in there best interest to place little social media
- icons on their pages. These are not just images. They contain <a href="https://developers.facebook.com/docs/plugins/like-button/">embedded code</a> that
- links back to the social media site, and, among other things, loads a third-party cookie on the device. These cookies are placed even if the user does
- not have an account with the social media platform. Over time, companies like Facebook (which also runs an ad network) have built up quite a large number
- of detailed profiles about people who have <a href="http://www.theverge.com/2016/5/27/11795248/facebook-ad-network-non-users-cookies-plug-ins">never even
- created an account on their site</a>.</p>
-
- <p>There is almost no good reason to ever enable third-party cookies. On devices with Android KitKat or older (version <= 4.4.4 or API <= 20), WebView
- does not <a href="https://developer.android.com/reference/android/webkit/CookieManager.html#setAcceptThirdPartyCookies(android.webkit.WebView, boolean)">differentiate
- between first-party and third-party cookies</a>. Thus, enabling first-party cookies will also enable third-party cookies.</p>
-
-
- <h3><img class="title" src="../en/images/ic_web_dark_blue.png"> DOM Storage</h3>
-
- <p>Document Object Model storage, also known as web storage, is like cookies on steroids. Whereas the maximum combined storage size for all cookies from
- a single URL is 4 kilobytes, DOM storage can hold <a href="https://en.wikipedia.org/wiki/Web_storage#Storage_size">megabytes per site</a>.
- Because DOM storage uses JavaScript to read and write data, enabling it will do nothing unless JavaScript is also enabled.</p>
-
-
- <h3><img class="title" src="../en/images/ic_subtitles_dark_blue.png"> Form Data</h3>
-
- <p>Form data contains information typed into web forms, like user names, addresses, phone numbers, etc., and lists them in a drop-down box on future visits.
- Unlike the other forms of local storage, form data is not sent to the web server without specific user interaction.</p>
- </body>
-</html>
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projects / PrivacyBrowserAndroid.git / blobdiff