Konqueror was created on 1996-10-14.
Ubuntu does not include Konqueror as standard, though it can be installed from the repositories. Its sister distribution, Kubuntu, ships Konqueror by default.
Ubuntu includes Mozilla Firefox by default. The web browser for Kubuntu is Konqueror.
No. Konqueror isn't the latest and greatest in a lot of things. Even though its site says it supports HTML5 and CSS3, it only supports a few implementations of them.
The Navigation Panel
The word "konqueror" is a file manager for KDE and web browser that allows one to view the file systems and local files from a remote server. One can download this software for free under the GNU license.
Mozilla Firefox, internet Explorer, Safari , Konqueror, Opera, Flock
Linux has several web browsers available, including Firefox, Konqueror, Dillo, Links, Lynx, Kazekhase, and Amaya.
Firefox Konqueror Internet Explorer (historic) Safari (only on Mac OS X) Opera Lynx
There appears to be a configuration error. You have associated Konqueror with application/x-msdos-program, but it cannot handle this file type.
It is called a web browser. There are many different ones. Examples are Firefox, Netscape, Opera, Safari, Amaya, Konqueror, Mosaic.
The default file manager in Ubuntu (Unity and GNOME) is Nautilus. In Kubuntu and KDE, it is Dolphin. You can install other file managers, such as Konqueror, and Thunar.