We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

When downloading a *.cap or *.capx file Firefox opens it where it should ask what to do with the file. What to do?

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by FredMcD

more options
  • .cap files are generated by Capella from capella.de a scorewriter program.

Whenever I open a *.cap or *.capx file Firefox opens it always with a kind of lister-program i.s.o. asking what to do.

Internet Explorer and Chrome handle these files in a correct way. There I can define to open these files with a Capella program. Firefox is the negative exception.

*.cap files are generated by Capella from capella.de a scorewriter program. Whenever I open a *.cap or *.capx file Firefox opens it always with a kind of lister-program i.s.o. asking what to do. Internet Explorer and Chrome handle these files in a correct way. There I can define to open these files with a Capella program. Firefox is the negative exception.

All Replies (1)

more options

Type about:preferences#applications<enter> in the address bar. In the search bar, enter cap If anything is listed, change the action (far right) to download or ask.