Safari (from version 3): How should the browser be configured so that there are no problems?

Do not save form data:

Menu item: "Options"
Tab: "Automatic filling"
Dialogue field: "Automatic web forms fill in"
Deactivate "Other forms" such as "User name and passwords"

JavaScript:

Menu item: "Options"
Tab: "Security"
Dialogue field: "Web content"
Deactivate "Activate JavaScript"

Allow pop-ups:

Menu items: "Options"
Tab: "Security"
Dialogue field: "Web content"
Deactivate "Eliminate pop-ups"

Additional settings (e.g.: SSL connection) are under

Menu items: "Options"
Dialogue field: "Proxies"
Button: "Change settings"

As shown in the previous Microsoft Edge/Google Chrome description.