Outgoing traffic: add URL parameter via squid reverse proxy?

[fips]

Hi,

I have an use case where an URL parameter has to be added to a specific url the all clients from inside LAN network.
So if I client call http://www.example.org on his browser, pfsense should add "/testparameter" so it would be "http://www.example.org/testparameter".

Can this be archived with squid reverse proxy or am I on the wrong way??