Thank you, Athanasius

Your suggestions does not work as expected, since the url needs to retain "&" to be correctly interpreted. Your solution, at least on my machine, produce a google search for the string "finance;source=lnms;tbm=isch" (instead of just "finance", being the rest parameters for the Google query).

I actually thought that the module would also take care for OS specific metacharacters. If this is not the case, I need to do it myself, meaning checking for the OS and modifying the url accordingly.