How to flush cookies and cache in the Opera Browser
Kindly note that after removing cookies and flushing the browser’s cache, all passwords and automatically saved access data will be deleted from the system by default. Therefore, when you use the passwords autosave feature in your browser when logging in to various sites, social networks, mail services, or online banking, make sure before clearing cookies and cache that (1) all your access data is stored in a backup document and (2) browser histories are saved again after the update.
Use the following instruction to flush cookies and cache in the Opera browser:
Click the "Opera" icon in the upper left of the browser window.
Select the "Settings" item in the opened menu.
In the section that opens on the left sidebar, open the “Advanced” list and select “Privacy & Security”.
Then select the "Cookies and site data" command.
Next, select the menu items indicated in the below screenshot.
Confirm your desired action by clicking the “Remove All” button.