Web links changed to wrong unrecognized URL links

Hello :smiley: !

I have a problem with weblinks as mine seems not working the proper way :

When I paste a link in a text doc the adress is (sometimes) transformed into a clickable link
BUT when I click on it the adress opened in firefox is wrong (same issue if I create a link manually) :

For exemple :
tries to open (sometimes sent to firefox, other time I have an error message) :

Importation (even in text is also not working).

I am using debian wheezy latest stable release and updates with xfce.

Does someone have the same problem and has solved the issue ?
Thank you in advance