it is possible by some modification of the UI files. you can find the file that is rendering the tabs as described here: How to find the location of the code for a page used in the user interface.
Then, you need to change the tabs array and set the FORM tab to be the first in the list.
Solution: In the CMSModules\Content\CMSDesk\Edit\EditTabs.aspx.cs file in the SelectTab method please change the default case to display form tab like this:
tabsModes.SelectedTab = formTabIndex;
This change will have affect on future upgrades and hotfixes as you are modifying the system file so it could be overwritten back to defaults, be aware of this fact please.