How to change sitename that appears in browser tab
Site name that appears in the browser tab can be changed by editing file which is located at “language/en/common.php”. Simply open this file with any file editor and locate the following lines.
'INDEX' => 'Index page'
Such line defines the second part of the site name. By default it’s set to “Index page”. We may change it to anything we would like to see in the web browser tab. After changing site name, save the file and upload it back to phpBB installation directory.
Now we may open the forum through web browser where it should show updated site name in the tab.