In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database.
Whenever phpmyadmin is idle for 1440 secs (24min) the session expires. I lose my place and have to login and start over.
I tried changing the $cfg['LoginCookieValidity'] = 3600 * 9; inside config.inc.php but it still times out in 1440 seconds.
I have restarted everything and cleared the browser cache (Firefox history -> Clear recent history -> Cache -> Everything).
I'm not sure why the increased timeout does not take effect. What am I doing wrong?
I have found the solution and using it successfully for sometime now.
Just install this Addon to your FF browser.