Opera Software
  1. Toolbars
  2. Menus
  3. Panels
  4. Speed Dial
  5. Bookmarks
  6. Extensions
  7. Opera Widgets
  8. Notes
  9. Geolocation
  10. Opera Link
  11. Opera Turbo
  12. Opera Unite
  13. Content blocking
  14. Fraud and Malware Protection
  15. BitTorrent
  16. Display modes
  17. Developer tools
  18. Preferences
  19. Advanced Preferences
  20. Skins
  21. Keyboard shortcuts
  22. Using the mouse
  23. E-mail and news
  24. Feeds
  25. Chat
  26. Dialogs
  27. Auto-update
  28. Backing up Opera

Programs

Preferences > Advanced > Programs

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Choose which programs Opera should use to handle specific protocols.

Protocol manager

You can create your own list of programs to launch when executing particular protocols in Opera. The default list includes:

Protocol Purpose
mailto Choose which application Opera should use for email; Opera's own built-in client, the default email client on your computer, or a specific other email client.

Source viewer

The source viewer is the program you want to launch when you select View > Source or press ⌘+U to see the source of a webpage.

By default, Opera will use its own built-in source viewer.