Are Adblock-Plus Visitors Seeing Your Content?
Posted on December 29, 2007 in Technology, Websites by Jeff Starr
As Firefox continues to grow in popularity, it is inevitable that more and more users will install plugins such as Adblock and Adblock Plus. As we know, such extensions work by filtering site contents through a list of predefined wildcard directives and other rules. Users may also customize the block-list by right-clicking on unwanted images or even subscribing to an automated filterset updater. Apparently, a significant number of Firefox users employ these extensions to help control the relentless flood of unwanted advertising around the Internet. This concept works great when advertisements are blocked, but what happens when users are unwittingly denied access to legitimate content?
The Two Adblock Extensions
As many are not aware, there are currently two suspiciously similar Adblock extensions for Firefox. As mentioned in the opening paragraph, Firefox users may install either “Adblock” or “Adblock Plus”, both of which are freely available via the Firefox Add-on pages. For many months now, I have been using Adblock Plus. If I remember correctly, I had replaced Adblock with Adblock Plus several months ago while resolving a conflict with some other extension (I should be keeping a log for such changes!). Since installing Adblock Plus, I have been noticing missing content from a significant number of visited sites. While not having the time (until today) to explore the situation in greater depth, I decided to snap a few screenshots along the way, capturing the Firefox view of any sites that seemed to present with missing content. Here are few of the more popular ones:
![[ Image: Abstracted Light Curve ]](http://perishablepress.com/press/wp-content/images/2007/misc-chunks/search-light.gif)
Shouts out: First of all, to everyone who reads my content on a regular basis, thank you! Things are finally rolling along quite smoothly, and I just wanted to take a moment to let you know that I truly appreciate your kind participation with Perishable Press. We have some great things planned in the near future, and look forward to sharing them with you.