Hi Roland,
No it's not a dumb question at all. I can't give you an exact answer except as follows.
Canon off-camera flash cords work with Fuji cameras and flashes because the pin configuration is the same. TTBOMK that's where the similarities end. Unless anyone else can come along and tell you otherwise, you will not have full communication Fuji to Canon. You should be able to use Canon (and other) flashguns in manual and probably auto modes but nothing more sophisticated than that.
Flash is an area in the X-Series that I would describe as "not fully developed" there are some Fuji and a brace of third party 'guns, but not yet a "system" a là Nikon or Canon. That said, there are rumours that this is being addressed in the New Year with the arrival of a new more powerful unit.
Hope this helps!