disable multiple file upload

Multiple file uploads can be disabled in the configuration file (config.js):

config.removePlugins = 'html5upload,flashupload';

May I ask why do you want to disable it?

Check CKFinder 2.2
Multiple file uploads should work there in other browser like Firefox, Chrome, without flash.

If you decide to remove just the flash uploader, use:

config.removePlugins = 'flashupload';

Nothing to be ashamed of, CKFinder 2.2 has just been released

The Gallery plugin is enabled by default and it uses Colorbox to display images (but you can add any other popular JavaScript lightbox gallery, too).

Use the View option from the file context menu to view an image -- previously each image opened in a new browser tab or window, now they are displayed in a lightbox, in a slideshow that lets you move from one to another without closing the previous one.