I have been using Yahoo email and Firefox together for years, and just this week I am unable to attach a file to an outgoing message. When I hit the "paper clip" to attach the screen goes to the File Explorer like usual to browse for the file, but it just sits there and spins. Then it says "not responding" on the top left at the Firefox icon. I tried it in Chrome and had no problem at all. Anybody got a clue? Thanks