Adblock Plus [SEP] programming language
technical protection measure, which is forbidden under the DMCA section 1201.
Detection.
Some webmasters have used JavaScript to detect the effects of the popular Adblock Plus filters. This is done by generating a honeypot-like URL, verifying its delivery, and DOM verification after the web page is rendered by the web browser, to ensure the expected advertising elements are present. Detection is simplified since the extension is not yet capable of replacing content; Loopback proxies provide this additional functionality.
These methods do not detect the presence
No update for the original Adblock was issued even after Firefox 1.5's release in November 2005. An official update supporting 1.5 was released more than a month later. In the meantime "McDonald" had released a compatible Adblock Plus version for Firefox 1.5.
Wladimir Palant wanted to help rue with the development of Adblock 0.5 but did not continue due to development disagreements. He eventually took over development of Adblock Plus from McDonald and rewrote the codebase, releasing Adblock Plus 0.6 in January 2006, thus making Adblock Plus a separate extension