cooperative-market/partner_firstname/views/res_partner.xml

<odoo>
  <record model="ir.ui.view" id="beesdoo_partner_name_form_view">
    <field name="name">beesdoo.partner.form.view</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_form" />
    <field name="arch" type="xml">
        <field name="name" position="replace">
            <field name="name" class="oe_read_only" />
            <field name="firstname" placeholder="First Name"
                class="oe_edit_only"
                attrs="{'invisible' : [('company_type', '=', 'company')]}" />
            <field name="lastname" placeholder="Last Name"
                class="oe_edit_only" default_focus="1" />
        </field>
    </field>
  </record>
</odoo>