There are no trademark or patent restrictions on this software. zip archive and replace the ".zip" extension with ".xpi" instead. To recompile the extension, add the top-level directory to a. xpi file with any archiver like 7-zip or Winzip. Therefore, K-Meleon needs a custom front-end to run extensions originally written for Firefox, Waterfox Classic, SeaMonkey, or Pale Moon. K-Meleon supports XUL-based extensions like those for classic Firefox but uses the native Windows (Win32) API for its user interface.
AdBlock Classic pulls from these open-source ad-blocking extensions to create a native ad-blocker for K-Meleon. Later, Binary Outcast forked that extension to create ABPrime. In 2015, AdBlock Lattitude was forked from AdBlock Plus for Pale Moon. AdBlock Classic is an open-source descendant of AdBlock Plus for Firefox.