Are We XBL Still? No!

Update as of October 2019: We've completed removing all XBL bindings from Firefox and are in the process of removing the implementation from Gecko. Thanks to everyone who helped with the project!

This site contains tools for understanding and working with XBL code in Firefox to make it easier to replace. If you'd like to read more about replacing XBL, see see this post and the wiki page, which contains a list of all newsletters and links to more resources. All work is being tracked in this meta bug.