Open PDF makes you save!!

After few Hrs of research find out that this particular setting will now open’s .PDF directly in IE; by default is “Strict” which prompts the user for file download.

Step-By-Step:
You can fix this by navigating in to central admin


Application Management >> Manage web application

Now choose your web application (select the row) which makes ribbon to be active

and you will see general settings (in enabled mode) Now choose general settings from the drop down

find he Browser File Handling section by default it's strict, change it to Permissive click ok and you are done!!