Firefox 5 At first I thought it was a problem on my machine, but then tried firefox on a completely separate computer and have the same problem. As of this morning, Firefox no longer sends .doc files to Word. It asks whether you want to save or find a program to open with. This is only firefox - the files open fine in explorer and all other browsers. And being this just started today on two completely different machines, the problem must be firefox in some way. The .doc file extensions do not show up in Options > Applications. Files do not open up directly from a website, or from the "Downloads" list. The same files opened fine yesterday. VERY aggravating - I have to switch to another browser to work.