mirror of
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255 lines
11 KiB
HTML
255 lines
11 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"[
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<!ENTITY % brandDTD SYSTEM "chrome://branding/locale/brand.dtd" >
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%brandDTD;
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]>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Privacy on the Internet</title>
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<link rel="stylesheet" href="chrome://help/locale/helpFileLayout.css"
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type="text/css"/>
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</head>
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<body>
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<h1 id="using_privacy_features">Using Privacy Features</h1>
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<p>Your browser includes features you can use to enhance the privacy and
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security of your personal information. The sections that follow describe how
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your browser can help you control cookies, passwords, forms, and images while
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you are surfing the Internet.</p>
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<p>Some web sites publish their privacy policies according to the Platform for
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Privacy Preferences (P3P) standard. For information on how to customize your
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browser based on this standard, see
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<a href="using_priv_help.xhtml#setting_privacy_levels">Setting Privacy
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Levels</a>.</p>
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<p>For information about related &brandShortName; security features, see
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<a href="mail_sec_help.xhtml">Signing & Encrypting Messages</a> and
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<a href="using_certs_help.xhtml">Using Certificates</a>.</p>
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<p>For general information about privacy and security, see the online
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documents:</p>
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<ul>
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<li><a href="http://browser.netscape.com/ns8/security/basics_virus.jsp">Virus
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protection</a></li>
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<li><a href="http://browser.netscape.com/ns8/security/basics_shopping.jsp">Online
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shopping (and Banking)</a></li>
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<li><a href="http://browser.netscape.com/ns8/security/basics_children.jsp">Children
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and the Internet</a></li>
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</ul>
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<div class="contentsBox">Privacy topics:
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<ul>
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<li><a href="#privacy_on_the_internet">Privacy on the Internet</a></li>
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<li><a href="using_priv_help.xhtml#using_the_cookie_manager">Using the
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Cookie Manager</a></li>
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<li><a href="using_priv_help.xhtml#using_the_password_manager">Using the
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Password Manager</a></li>
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<li><a href="using_priv_help.xhtml#using_the_form_manager">Using the Form
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Manager</a></li>
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<li><a href="using_priv_help.xhtml#encrypting_stored_sensitive_information">Encrypting
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Stored Sensitive Information</a></li>
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<li><a href="using_priv_help.xhtml#managing_images">Managing Images</a></li>
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<li><a href="cs_priv_prefs_popup.xhtml#controlling_popups">Controlling Popups</a></li>
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<li><a href="privsec_help.xhtml">Privacy & Security Preferences</a></li>
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</ul>
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</div>
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<h1 id="privacy_on_the_internet">Privacy on the Internet</h1>
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<p>This section summarizes some background information about privacy on the
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Internet. It also describes several things you can do to help safeguard your
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own privacy. It is not intended to provide a complete description of Internet
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privacy issues.</p>
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<div class="contentsBox">In this section:
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<ul>
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<li><a href="#what_information_does_my_browser_give_to_a_web_site">What
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Information Does My Browser Give to a Web Site?</a></li>
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<li><a href="#what_are_cookies_and_how_do_they_work">What Are Cookies, and
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How Do They Work?</a></li>
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<li><a href="#how_can_i_control_web_pages_in_email_messages">How Can I
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Control Web Pages in Email Messages?</a></li>
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<li><a href="#how_can_i_make_sure_unauthorized_people_dont_use_information_about_me">How
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Can I Make Sure Unauthorized People Don't Use Information About
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Me?</a></li>
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</ul>
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</div>
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<h2 id="what_information_does_my_browser_give_to_a_web_site">What Information
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Does My Browser Give to a Web Site?</h2>
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<p>When your browser displays a web page—for example, each time you click
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a link or type a URL, or when a web page is displayed in an email
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message—it gives certain kinds of information to the site. This
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information may include (but is not limited to) your operating environment,
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your Internet address, and the page you're coming from.</p>
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<h3>Operating Environment</h3>
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<p>The site is told something about your operating environment, such as your
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browser type and operating system. This helps the site present the page in
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the best way for your screen. For example, the site might learn that you use
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the French version of Mozilla 1.2 on a Windows 2000 computer.</p>
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<h3 id="internet_address">Internet Address</h3>
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<p>Your browser must tell the site your Internet address (also known as the
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Internet Protocol, or IP address) so the site knows where to send the page
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you are requesting. The site can't present the page you want to see
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unless it knows your IP address.</p>
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<p>Your IP address can be either temporary or fixed (static).</p>
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<p>If you connect to the Internet through a standard modem that's attached
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to your phone line, then your Internet service provider (ISP) may assign you
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a temporary IP address each time you log on. You use the temporary IP address
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for the duration of your Internet session—for example, until you sign
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off or hang up your dial-up connection, or otherwise end your computer's
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live connection with the Internet. Each ISP has many IP addresses, and they
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assign the addresses at random to users.</p>
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<p>If you have DSL, a cable modem, or a fiber-optic connection, you may have a
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fixed IP address that you use every time you connect.</p>
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<p>Your IP address is not the same as your email address.</p>
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<h3>Referring Page</h3>
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<p>The site is also told which page you were reading when you clicked a link to
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see one of the site's pages. This allows the site to know which site
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referred you. Or, as you traverse the site, it allows the site to know which
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of its pages you came from.</p>
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<p>[<a href="#privacy_on_the_internet">Return to beginning of section</a>]</p>
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<h2 id="what_are_cookies_and_how_do_they_work">What Are Cookies, and How Do
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They Work?</h2>
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<p>A cookie is a small bit of information used by some web sites. When you
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visit a site that uses cookies, the site might ask your browser to place one
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or more cookies on your hard disk.</p>
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<p>Later, when you return to the site, your browser sends back the cookies that
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belong to the site.</p>
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<p>When you are using the default cookie settings, this activity is invisible
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to you, and you won't know when a site is setting a cookie or when your
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browser is sending a web site's cookie back. However, you can set your
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preferences so that you will be asked before a cookie is set. For information
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on how to do this, see
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<a href="using_priv_help.xhtml#setting_privacy_levels">Setting Privacy
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Levels</a>.</p>
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<h3>How Do Sites Use Cookie Information?</h3>
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<p>Cookies allow a site to know something about your previous visits. For
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example, if you typically search for local weather or purchase books at a web
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site, the site may use cookies to remember what city you live in or what
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authors you like, so it can make your next visit easier and more useful.</p>
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<p>Many web sites publish privacy policies that describe how they use the
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information they receive.</p>
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<p>You can check a web site's privacy policy to see what it says about the
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information it collects, how that information is used, and what choices you
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have regarding the use of that information. To learn how to do this, see
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<a href="using_priv_help.xhtml#viewing_privacy_policies">Viewing Privacy
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Policies</a>.</p>
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<p>For information on how to manage cookies with the aid of published privacy
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policies, see <a href="using_priv_help.xhtml#setting_privacy_levels">Setting
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Privacy Levels</a>.</p>
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<h3 id="what_are_third-party_cookies">What Are Third-Party Cookies?</h3>
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<p>If your browser stores a site's cookie, it will return the cookie only
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to that particular site. Your browser will not provide one site with cookies
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set by another. Since a web site can only receive its own cookies, it can
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learn about your activities while you are at that site but not your
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activities in general while surfing the Web.</p>
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<p>But sometimes a web site displays content that is hosted on another web
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site. That content can be anything from an image to text or an advertisement.
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The other web site that hosts such elements also has the ability to store a
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cookie in your browser, even though you don't visit the site directly.
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</p>
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<p>Cookies that are stored by a site other than the one you are visiting are
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called <strong>third-party cookies</strong> or <strong>foreign
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cookies</strong>. Web sites sometimes use third-party cookies with
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<strong>transparent GIFs</strong>, which are special images that help sites
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count users, track email responses, learn more about how visitors use the
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site, or customize your browsing experience. (Transparent GIFs are also known
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as web beacons or web bugs.)</p>
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<p>If you want, you can adjust your cookie preferences so that sites can store
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ordinary cookies but not third-party ones.</p>
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<p>[<a href="#privacy_on_the_internet">Return to beginning of section</a>]</p>
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<h2 id="how_can_i_control_web_pages_in_email_messages">How Can I Control Web
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Pages in Email Messages?</h2>
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<p>You can disable cookies, images, JavaScript, and plug-ins completely for
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web pages that are received as part of email messages.</p>
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<p>While it may be convenient to enable some or all of these capabilities when
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you're browsing the web, they may not be necessary in single web pages
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sent as attachments to messages.</p>
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<p>For information on enabling or disabling cookies, images, JavaScript, and
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plug-ins in email messages, see the following sections:</p>
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<ul>
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<li><a href="using_priv_help.xhtml#cookies">Privacy & Security
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Preferences - Cookies</a></li>
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<li><a href="mail_help.xhtml#message_display">Mail & Newsgroups
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Preferences - Message Display</a></li>
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<li><a href="cs_nav_prefs_advanced.xhtml#scripts_and_plug-ins">Advanced
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Preferences - Scripts & Plug-ins</a></li>
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</ul>
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<p>[<a href="#privacy_on_the_internet">Return to beginning of section</a>]</p>
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<h2 id="how_can_i_make_sure_unauthorized_people_dont_use_information_about_me">How
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Can I Make Sure Unauthorized People Don't Use Information About Me?</h2>
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<p>The best way to keep your information private is to read the privacy
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policies for the web sites you visit and the Internet services you use, and
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to be cautious about giving out your personal information online.</p>
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<p>The Internet is a public network. When you send your name, phone number,
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address, and other personal information over the network (via a web page,
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email, or any other method), it is possible that someone else may be able to
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intercept it.</p>
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<p>Here are some questions you might ask about a web site's privacy
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policy:</p>
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<ul>
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<li>What kinds of personal information is this site gathering?</li>
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<li>How will the site use the information?</li>
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<li>Will the site share the information with others and do I have choices
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regarding the use of any shared information?</li>
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<li>Can I access some or all of the information a site gathers about me, in
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order to inspect or update it?</li>
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<li>How does the site protect the information?</li>
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<li>How do I contact the web site if I have questions or problems?</li>
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</ul>
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<p>For information about checking a web site's privacy policy, see
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<a href="using_priv_help.xhtml#viewing_privacy_policies">Viewing Privacy
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Policies</a>.</p>
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<p>[<a href="#privacy_on_the_internet">Return to beginning of section</a>]</p>
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<p>Copyright © 2003-2010 The Mozilla Foundation.</p>
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</body>
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</html>
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