Settings Opera

(Download from: www.opera.com)
(source)

Open Opera and click: "File" >"Preferences"

Start and exit >Choose here: "Start with no pages" or fill in another
address in the Homepage field and choose "Start with home page"
Mouse and keyboard >"Enable auto-completion dropdown" disable
Windows >Choose at: "Pop-ups" the option: "Refuse pop-ups" or "Open requested
pop-ups only"
Multimedia
"Enable plug-ins" enable. (When you plan on using this browser for anonymous surfing choose disable)
"Enable javascript" enable (When you plan on using this browser for anonymous surfing choose disable)
"Enable java" disable
File types >Determine action by MIME type enable
History and cache -"Typed in addresses" set to 0
-"Visited addresses" set to 0
-"Disk cache" choose option: "off"
-"Empty on exit" enable Privacy -Enable referring logging disable (If you prefer not to
allow a Web site to know where you were before visiting it)
-Enable automatic redirection disable
-Enable cookies disable
-At: "Normal cookies" choose option: "Do not accept cookies"
-At: "Third party cookies" choose option: "Do not accept third party cookies"
-"Display warning for illegal domains", you can enable this
(so that Opera can inform you that a site has attempted to plant an
illegal cookie that could be used to track your movements across the Net)
-Accept illegal path disable Security >"Enable wand" (saving passwords) disable
Click Apply