For security purposes, just to see the passwords in Opera not. All information is stored in encrypted form. "Master password" will help you remember only username, password is shown in asterisks. To recover passwords in Opera you need to know some secrets of this browser.
To begin, open the Opera browser and click on the link
Find the button "Wand + capture + report". With your mouse drag it on top of the browser.
Click the right mouse button on the top bar Opera. Opens the context menu. In the menu select "setup", then select "Registration".
In the open window "Decoration" looking for "tab Button". In the left list you will see the item "My button". From that window again with your mouse, drag the button "Wand + capture + report" on the top bar of the browser.
Go to the website to which you need to remember the password. Click on the new button Wand + capture + report" out of the top of your browser. On the screen a window appears "Javascript", which will contain a saved password in Opera. To log on to the website, click "OK".