As a Windows person I always ask about the file extension, for example, '''resume''.docx''''' or '''proposal''.doc'''''. Do the files have one of those common Word file extensions, yet your Mac still treats them as TextEdit documents? Could you try the steps in the following article to associate doc/docx files with Word: https://www.laptopmag.com/articles/how-to-change-default-applications-mac Does that work? If that works, the next step would be to check whether Firefox has picked up Word as the appropriate system application for doc/docx files. You can try the steps in the following article: [[Change what Firefox does when you click on or download a file]] Any luck?