Konqueror is a web browser, file manager and file viewer designed as a core part of the K Desktop Environment. It is developed by volunteers and can run on most Unix-like operating systems. Konqueror, along with the rest of the components in the KDEBase package, is licensed and distributed under the GNU General Public License.
The name "Konqueror" is a reference to the two primary competitors at the time of the browser's first release: "first comes the Navigator, then Explorer, and then the Konqueror". It also follows the KDE naming convention: the names of most KDE programs begin with the letter K.
Navigation functions (back, forward, history, etc.) are available during all operations. Most keyboard shortcuts can be remapped using a graphical configuration, and navigation can be conducted through an assignment of letters to nodes on the active file by pressing the control key. The address bar has extensive autocompletion support for local directories, past URLs, and past search terms.
The application uses a tabbed document interface, wherein a window can contain multiple documents in tabs. Multiple document interfaces are not supported, however it is possible to recursively divide a window to view multiple documents simultaneously, or simply open another window.
Konqueror integrates several customizable search services which can be accessed by entering the service's abbreviation code (for example, gg: for Google) followed by the search term(s). One can add their own search service; for instance, to retrieve Wikipedia articles, a shortcut may be added with the URL
Konqueror's rendering speed is on par with that of competing browsers, but sites with malformed HTML are sometimes less leniently rendered than by other browsers. Problems can also result from the use of plugins on a web site which cannot be run under the operating system on which Konqueror is run; the use of QuickTime movies, or Shockwave animations can result in such problems. However, SWF (Flash), PDF, Java applets, and other plugins are supported if the respective software is installed.
Konqueror also allows browsing the local directory hierarchy—either by entering locations in the address bar, or by selecting items in the file browser window. It allows browsing in different views, which differ in their usage of icons and layout. Files can also be executed, viewed, copied, moved, and deleted.
The user can also open an embedded version of Konsole in which they can directly execute shell commands.
Although this functionality is not removed from it, in KDE 4 Konqueror is replaced by Dolphin as the default file manager.
KParts can also be used to embed certain types of multimedia content into HTML pages; for example, KMPlayer's KPart enables Konqueror to show embedded video on web pages.
In addition to browsing files and web sites, Konqueror utilizes KIO plugins to extend its capabilities well beyond those of other browsers and file managers. It uses components of KIO, the Konqueror I/O plugin system, to access different protocols such as  and FTP (support for these is built-in).
Similarly, Konqueror can use KIO plugins (called IOslaves) to access ZIP files and other archives, smb (Windows) shares, to process ed2k links (edonkey/emule), or even to browse audio CDs, ("audiocd:/") and rip them via drag-and-drop. The FISH ("fish://user@host") IOslave allows Konqueror to manage files on remote secure shell servers, and the "man:" and "info:" IOslaves are handy for fetching nicely formatted documentation.
A complete list is available in the KDE Info Center's Protocols section.
Konqueror has traditionally been developed for Linux, but it supports all platforms that KDE supports. This includes other Unix-like systems, such as BSD and Solaris, as well as Mac OS X. Konqueror can be run under Windows as part of the KDE on Windows project.
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