layoutdebug.jar:
% content layoutdebug %content/layoutdebug/
% locale layoutdebug en-US %locale/en-US/layoutdebug/
  content/layoutdebug/contents.rdf                 (content/contents.rdf)
  content/layoutdebug/layoutdebug.xul              (content/layoutdebug.xul)
  content/layoutdebug/layoutdebug.js               (content/layoutdebug.js)
  content/layoutdebug/layoutdebug-overlay.xul      (content/layoutdebug-overlay.xul)
  locale/en-US/layoutdebug/contents.rdf            (locale/en-US/contents.rdf)
  locale/en-US/layoutdebug/layoutdebug.dtd         (locale/en-US/layoutdebug.dtd)
  locale/en-US/layoutdebug/layoutdebug-overlay.dtd (locale/en-US/layoutdebug-overlay.dtd)