In versions lower than 4.7 of kdelibs put a global proxy SOCKS en KDE it was apparently impossible (I mean apparently, because I never actually did the test). Now with kdelibs version 4.7 (or higher ones when they come out) you can now have this type of proxies 
For this we must edit the file: ~ / .kde4 / share / config / kioslaverc (if blank, try:
1. For this we press [Alt] + [F2] and we write «kate ~ / .kde4 / share / config / kioslaverc » (without the quotes) and press [enter].
2. There we must put: socksProxy = socks: // "HOST": "PORT"
- We changed "HOST" by our proxy server and "PORT" through our port. In my case it would be - » socksProxy = socks: //10.10.0.15: 8010
3. Once this is done, it is recommended to go to the system settings, specifically to the section dedicated to the network and there you can configure proxy for HTTP, HTTPS and FTP ... but!!! they should not click the button to configure these changes globally (that is, system wide).
And that's it, this will do. 