Web ads aren't just annoying, they can also be the source of a malware infection that attempts to steal your identity. In her September 15, 2009 InSecurity Complex blog, Elinor Mills describes how ads are being used by criminals to trick people into buying fake antivirus software, among other nefarious purposes.
Technology to block the ads that appear on Web pages has been around for almost as long as the ads themselves. No doubt someone will point out the irony of a blog that relies on ads for its livelihood explaining how to prevent them from appearing. For better or worse, few people will actually take the time to use an ad blocker when they browse. I don't think online advertisers are losing much sleep over the technology—yet.
Skip the ads when viewing pages in Firefox
One of the most popular Firefox add-ons is Adblock Plus, which puts an "ABP" icon on the far right of the main menu. Click it (or press Ctrl-Shift-V) to view the blockable items on the current page. Choose the down arrow next to the icon to open the program's Preferences dialog, disable ads on the page or site, or select other options.
Click the Adblock Plus icon to view blockable items on the current page.
(Credit: Wladimir Palant)Hovering over the Adblock Plus icon shows the add-on's status and the number of blocked and blockable items on the current page. You can also open the program's Preferences dialog by clicking Tools > Adblock Plus Preferences. There you can subscribe to an ad filter, import and export blocklists, view and reset your "hit" list, and change your view. Another option lets you remove the block tabs that appear by default on Flash and Java items.
Block ads in Internet Explorer
Back in January 2008, I called the free IE7Pro "(t)he only Internet Explorer 7 add-on you'll ever need." Well, the name's the same, but the program now works with IE 8 as well. Blocking ads in IE is as easy as downloading and installing IE7Pro, clicking Tools > IE7Pro Preferences, and checking Ad Blocker on the main Modules tab. The program blocks Flash, Java, pop-ups, pop-unders, and other types of Web ads.
Activate ad blocking in Internet Explorer by choosing the Ad Blocker option in IE7Pro's Preferences dialog.
(Credit: IE7Pro Team)To put a finer point on your IE ad blocking, select the AD Blocker option on the left side of the Preferences window. There you can enable the program's Flash blocker, which is off by default. You can also make changes to the IE7Pro filters, but you can't import or export filters as easily as you can using Firefox's Adblock Plus.
Use a proxy to squash ads in Chrome
It isn't surprising that Google decided not to include an ad blocker in its Chrome browser. After all, the company makes quite a bit of money from serving up those ads, so helping people to block them would be self-defeating. I found a couple of ad-blocking extensions for Chrome, but after taking a look at them, I just didn't trust them.
In one case, the home page of the extension's provider was crowded with ads itself. And another Chrome ad blocker I looked at had an unfinished appearance. The best solution I could find for blocking ads in Chrome is the Privoxy Web proxy, which is available on Source Forge. Configuring the add-on is a challenge, but a post on the GeekZone tech community boils it down nicely to seven steps.
Block ads in Opera, no add-ons required
The best way I found to block ads in the Opera browser is to use the program's built-in content blocker. To activate it, right-click anywhere on the page and choose Block Content. Only the blockable content on the page will be highlighted, and a toolbar appears at the top of the page. Choose an item to block it, and then click Done on the toolbar to reload the page minus the elements you selected.
To unblock an item, just reopen the Block Content toolbar and click the "Blocked Image" indicator. You can also view the URLs of all blocked items on a page, edit the entries, and add or delete items. There's no option to import or export a list of blocked URLs, however.
Bonus tip: Block ads and malicious sites via the free OpenDNS proxy service
Perhaps the greatest security resource on the Web is the free OpenDNS proxy service, which sends all your Internet traffic through a well-maintained set of filters to screen out ads as well as sites known to host malicious content. You can use the OpenDNS service to block gambling, adult, and other specific types of sites. For instructions on using OpenDNS, see Becky Waring's article "Use OpenDNS to surf safely with these tricks" on the Windows Secrets site.
A big reason for the growing popularity of the Mozilla Foundation's Firefox browser is the amazingly creative and abundantly useful add-ons that are being created for Firefox. My three new favorites let you ax the ads on a site, see the tracking pixels on the current page, and gain a wealth of options when you select and right-click text in your browser.
Browse faster by blocking ads
Wouldn't you like to watch TV and listen to the radio without having to sit through the ads that pay the freight? Or dismantle the billboards that line the freeways? I can't help you with TV spots or roadside distractions, but you can kiss Web ads good-bye. Just download and install Wladimir Palant's Adblock Plus extension for Firefox.
After browsing with Adblock Plus enabled for a while, I started to wonder how I ever managed to surf without it. I noticed an immediate increase in the load speed of many of the sites I visit frequently, such as ESPN.com and CNN.com. And it's so much easier to find the information I'm looking for on a crowded page without all the ads getting in the way.
When you restart Firefox after installing Adblock Plus, you're given the option to import a set of filter rules or create your own rules. I took the easy route and opted for the canned filters, which do a good job of removing the ads from the sites I frequent.
You can view the number of blocked items on the current page by hovering the mouse pointer over the "ABP" icon in the top-right corner of the Firefox window. Or click the down arrow to the right to access the extension's preferences and other options.
View the number of blocked ads on a page by hovering over the ABP icon.
(Credit: Wladimir Palant)Some ads manage to slip past Adblock's filters, but you block them in the future by right-clicking the ad and choosing Adblock Image. There are a wealth of other options in the program; visit the developer's FAQ page for more information.
Know when you're being tracked
I'm usually not very curious about which of the Web-tracking services may have planted a pixel in the Web pages I visit, but knowing which sites use which tracking services gives me a little more information about what I can expect from the people behind the site.
Jan Bogutzki's Counterpixel detects the presence of tracking pixels from 19 different services, including Google Analytics, WebTrends, and Site Meter.
Counterpixel doesn't block the trackers; it merely alerts you to their presence on the current page. This might provide more information than the average Firefox user needs, but the add-on is a great way to find out a little bit more about the sites you frequent.
Get more right-click options for selected text
I've been using the Hyperwords extension for only a few days, which is not nearly enough time to learn all the text tricks this program performs. The first Hyperwords feature that caught my eye was the Translation option, which lets you convert the selected text into more than a dozen languages.
Customize the right-click options that the Hyperwords extension adds to Firefox.
(Credit: Hyperwords)Other Hyperwords context-menu options let you search for the selected text at various reference sites and view other occurrences of the text on the page by sentence or paragraph, among other alternatives. You can also save the selection as a text file or send it directly to your printer.
It's a mystery to my why more people still use Internet Explorer than Firefox or any other competing browser. But I don't get the success of American Idol, either, so it must be me.
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