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March 19, 2008 12:01 AM PDT

Set Internet Explorer and Firefox to maximize your security

by Dennis O'Reilly

Modern browsers are much better than their predecessors at keeping your Web activity private and your data safe. Still, you may not have your browser configured to provide optimum security. Take a few minutes to give Internet Explorer 7 and Firefox 2 a safety check.

Batten down IE7's hatches
The version of IE7 for Vista adds the Protected Mode, which allows Web sites to access only the Temporary Internet Files folder on your PC. According to Microsoft, this feature is on by default for the Internet, Intranet, and Restricted zones, but disabled for the Trusted Sites and Local Machine zones. On my machine it was enabled for all zones. You'll see "Protected Mode: On" in the status bar when it's active, or click Tools > Internet Options > Security, and make sure "Enable Protected Mode (requires restarting Internet Explorer)" is checked at the bottom of each zone.

The Security section of IE7 for Vista's options

Maximize security in IE7 for Vista by making sure Protected Mode is enabled.

(Credit: Microsoft)

There have been some reports of Protected Mode causing problems, so if a particular page won't load or run correctly, disabling this feature may solve the glitch, though I don't recommend keeping Protected Mode off. The Web's not getting any safer, and you need all the protection you can get.

Another great new feature in IE7--for XP and Vista alike--is the Phishing Filter. Why the filter is off by default I'll never know. To activate it, click Tools > Phishing Filter > Turn On Automatic Website Checking > OK. Unfortunately, choosing Tools > Phishing Filter > Phishing Filter Settings merely opens the Advanced Internet Options dialog box, where you can scroll down to the Phishing Filter section under Security, only to find that your only two options are to disable the filter, and to "turn off automatic website checking." But while you're in the Advanced Options settings, make sure "Automatically check for Internet Explorer updates" is checked in the Browsing section. Click OK when you're done.

Get into the habit of covering your browsing tracks on a regular basis. In IE7 you can wipe out your browser history, Temporary Internet Files, cookies, saved form data, and saved passwords at one time by clicking Tools > Delete Browsing History > Delete All. Or erase each category separately by clicking the appropriate button in the Delete Browsing History dialog box.

Internet Explorer 7's Delete Browsing History dialog box

Wipe your browser's history clean by clicking Delete All in IE7's Delete Browsing History dialog, or clear each category separately.

(Credit: Microsoft)

Stay safe while browsing with Firefox
Just because Mozilla's open-source browser has a reputation for security doesn't mean you can use it to visit any site on the Web without a care in the world. Last month I described NoScript, a free Firefox add-on (donationware, actually) that lets you decide which scripts can run on which Web pages on a case-by-case basis. If you use Firefox regularly and you haven't added NoScript, download and install it, and in no time you'll wonder how you ever browsed without it.

There's another simple step you can take to improve Firefox's security: Make sure you have the browser set to update automatically. The current version is 2.0.0.12; to check your copy's version, click Help > About Mozilla Firefox, and look for the version number under the product's name. To verify that the program updates automatically, click Tools > Options > Advanced > Updates, and make sure Firefox is checked under "Automatically check for updates to." You may also want to check "Automatically download and install the update" under "When updates to Firefox are found." I also check "Installed Add-ons" under the former, and "Warn me if this will disable any of my add-ons" under the latter.

Mozilla Firefox's update settings in the Advanced Options dialog box

Set Firefox to check for updates automatically via the Advanced Options dialog box.

(Credit: Mozilla Foundation)

Not long ago an attempt was made to spoof Firefox's address bar to fool people into thinking they were on a site other than the one they were actually visiting when a link opened in a new window. The simplest way to avoid this is by setting Firefox to open links in a new tab rather than a new window: Click Tools > Options > Tabs, and make sure "A new tab" is selected under "New pages should be opened in." You can also disable this feature by typing about:config in the address bar, pressing Enter, navigating to dom.disable_window_open_feature.location, and double-clicking it to change it to "true".

Web sites often know the page you were on before you opened one of their pages. To block this referrer header, type about:config in the address bar, press Enter, navigate to network.http.sendRefererHeader, double-click it, and set the integer value to 0.

Tomorrow: Get your Office docs online with Office Live Workspace.

Dennis O'Reilly has covered PCs and other technologies in print and online since 1985. Along with more than a decade as editor for Ziff-Davis's Computer Select, Dennis edited PC World's award-winning Here's How section for more than seven years. He is a member of the CNET blog Network, and is not an employee of CNET.
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Add a Comment (Log in or register) (7 Comments)
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by kool_skatkat March 19, 2008 2:57 AM PDT
How about Safari? is it so safe that it doesn't require a mention in this article?
Reply to this comment
by unhappybirthday March 19, 2008 6:47 AM PDT
Yeah, it's super-safe:
http://www.news.com/8301-10789_3-9897000-57.html
by binnikemask March 19, 2008 4:02 PM PDT
kool_skatkat: Read the headline of the article; "Set Internet Explorer and Firefox to maximize your security". Does it contains "Safari"? No, it doesn't. Therefore Safari does not require a mention in the article. You don't need to mention ALL competitors every time you write about a product or service - even if the competitor is from Apple. That would just be plain stupid.
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by sunnybob March 25, 2008 10:40 AM PDT
Another way to block referrer in Firefox is to use the "RefControl" add-on, which offers several options for handling referring, including blocking, forging the referring site, normal referring, custom, or 3rd party requests only. Options can be set for individual sites or as default. Setting Google to "forge" seems to prevent it from refusing to serve a search request while user is in TOR, which Google interprets as possibly coming from a viral bot of some sort. I've set "block" as default . The only exception to that is "forge" for Google.
Reply to this comment
by vlo58 March 26, 2008 9:44 AM PDT
In the artical under the IE section you said " Advanced Options settings, make sure "Automatically check for Internet Explorer updates" is checked in the Browsing section. Click OK when you're done." I could not find that option to check. I have the IE7 so how do I make sure it's getting updated? Appreciate anyones help.
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by wrg64 March 27, 2008 7:50 PM PDT
I use Firefox and try to stay up to date on security, but please be aware that this change may cause web pages relying on the .aspx file extension to stop working. Did it to me at least.
Reply to this comment
by ArmoredCavalry April 12, 2008 7:57 AM PDT
Also, it prevents firefox from logging in to Newegg.
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About Workers' Edge

Dennis O'Reilly has covered PCs and other technologies in print and online since 1985. Along with more than a decade as editor for Ziff-Davis's Computer Select, Dennis edited PC World's award-winning Here's How section for more than seven years. He is a member of the CNET Blog Network and is not an employee of CNET.

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