Simultaneous trouble with firefox and avast

Today I can’t open firefox and can’t open avast. The avast icon does not move to show that it is working. Avast shows a new version installed yesterday. I’ve tried to uninstall firefox and get a message that it is open over and over. I found the avast site and supposedly did the repair successfully, but nothing has changed.
For quite some time, when I log on in the mornings, I get a message that the windows defender and avast are off, and the issues flag shows two issues. I manually get the firewall back on and the issues change to one. The avast has been working even though the messages say it is off, until today.

  • Which Avast…? (Free/Pro/IS/Premier)
  • Which version…?
  • OS…? (32/64 Bit…? - which SP/Build…?)
  • Other security related software installed…?
  • Which AV(s) did you use before Avast…?

Also:

  • Which Firefox…? (version and bitness)