We are using the WYSIWYG Editor. When we click the Browse button on the "Insert/edit image” popup, it takes about 2-3 minutes to load the image browser.
What could be causing the extreme slowness?
Do you have too many images in that directory? That can be the obvious reason which I've experienced earlier. In that case, you should avoid putting all images into the same directory; instead of that, you should split them across directories with initials of image filename.