You may have switch on the VoiceOver accessibility feature (System Preferences -> Speech;(fn) Cmd-F5)

• http://guides.macrumors.com/System_Preferences#Speech

• http://www.apple.com/accessibility/voiceover/

Thank you. I don't know why Voice Over would only speak the downloads--no other talking about other navigation.

It's still talking! I'm pretty darned sure it's a Firefox thing because it only happens when I download. Any thoughts?

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.com/kb/Safe+Mode

• https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes