Chrome List lets you check all the files, add-ons and profiles you have got installed in your
Mozilla Firefox browser or in your
Thunderbird client. The program also works with XULRunner applications, and installs by the "Explore Chrome ..." option in the tools menu.
Apart from that, you can see the whole Chrome structure, see Firefox or Thunderbird mapped files, see the source code for those files, save them in another place, list possible problems, etc.