Mozilla / Chrome based Browsers modulate URL of my own websites on Galaxy Note 2

[manni65929]

Hi folks,

I am working to two projects using wordpress. To check the responsiveness of my sites, I go with Chrome or Firefox to these sites.
Since the update to Android 4.3, however, I am no longer able to visit the site since the URL I enter, is modified by the browser.

The orginal URL [http://www.sample-site.com]Sample Site | Sample Site* the URL is suddenly changed to [www.samplesite.comhttp/www.samplesite.com
This happens only when my WLAN is on with Chrome, Firefox, Opera but NOT with Opera Mini. It doesn't occur when I am using standard non-wlan mobile data.

How I can correct this problem?
Complete reset to factory settings on both the smart phone and the router take no effect whatsoever.

Information of my System:

Smartphone:
Samsung Galaxy Note II (GT-N7100)
Android: 4.3
Browser: Chrome (31.0.1650.59); Firefox (26.0.1); Opera (12.10)

Router:
FritzBox 7390; Firmware: 06.01

Service Provider:
Telekom Germany (for Internet, Landline and Mobile)
Strato Germany (Hosting)

Thanks in advance for your help.