toolkit.jar:
* content/global/viewSource.xul            (content/viewSource.xul)
* content/global/viewSource.js             (content/viewSource.js)
* content/global/viewPartialSource.xul     (content/viewPartialSource.xul)
* content/global/viewPartialSource.js      (content/viewPartialSource.js)
* content/global/viewSourceOverlay.xul     (content/viewSourceOverlay.xul)

en-US.jar:
  locale/en-US/global/viewSource.dtd       (locale/viewSource.dtd)