WordPress is most popular because of Open Source and its plugin functionality.When you install plugin from wordpress admin, it will ask for FTP details. Entering FTP details every time is very irritating. If you are facing the same problem than just add below lines. It will not ask for FTP details once you add below lines.
Below are the steps to add couple of line code.
1) Open wp-config.php file from wordpress root folder.
2) Add below code under this line. define(‘NONCE_KEY’, ‘put your unique phrase here’);
define(“FTP_USER”, “your FTP username”);
define(“FTP_PASS”, “your FTP password”);
Thats it. Let me know if you find any problem.