I just saved MS Word document as mht and whenever Firefox open that is blank. It keep showing window Open/Save. Whenever I open it show the same window and doing so open many blank tab no documents. From file property I confirmed Firefox was chosen later I changed to MS IE explorer (I had no choice) it opened without problem. I like Firefox and do not use MS IE, I wonder why can't Firefox open mht file. In past there wasn't any problem. If I am doing any thing wrong or if there is any procedure I got to follow please guide me. Thank you