web_techsystech/web_widget_open_tab/readme/USAGE.md

Edit the tree view and add the widget as the first field, usually, we should use: .. code-block:: xml

<field name="id" widget="open_tab"/>

You can open the record in a new tab when clicking with the mouse wheel on the external link icon. On a usual click the record will be opened without changes (keeping the breadcrumbs).

You can also add open-tab field in tree views by selecting "Add Open Tab Field" field in the ir.model record. When you do this, the open-tab field is added right after the name field in the tree if the field exists, otherwise at the beginning of the tree.