I do not see an easy way to do this from verizon webmail, If you set up a recent version of outlook and use it to manipulate your mail you can easily export to various formats. If you want a free solution ttps://mail.zoho.com/biz/index.do
Set this up to manipulate your mail and contacts. Then once contact are imported from VZ, they can be saved as HTML, CSV. VCard etc.
sadly there is no way to Export from verizon in regards to contacts I know it would be a good thing to have so we can all save our contacts/back them up