Don't know how to delete browser cookies (Android)

1. Tap on the Chrome menu (the three vertically-aligned dots) and select Settings;
   
   

     
   
   

2. Under Advanced, select Privacy and tap on Clear browsing data. Then, uncheck (untick) all the other options, except Cached images and files and tap on Clear data. 
   
   

       

To delete cookies, follow the steps below:

1. Tap the Opera icon in the bottom-right corner and select Settings;
   
   

   
   
   

2.  Tap on Clear browsing data..., check (tick) the checkbox next to Clear cookies and data, and uncheck the other check boxes, and tap on OK.
   
   
     

1. Tap on the menu icon (the three-dot icon) in Firefox and select Settings;
   
   

    
   
   

2. Scroll to find the Clear private data option and tap on it. Then, check (tick) all the types of private data you want to clear and tap on Clear data;