I have to perform upgrade from Firefox 14.0.1 to Firefox 25.0.1.

I have downloaded offline installer and installing it. 

i have downloaded and its installing fine for -MS . after launching the icon in desktop getting following prompts import The settings and data import install solutions, bookmarks, browsing history, lose the north, and other data from:

         Microsoft internet explorer(need to select this option)
         import not anybody Thing


 valj homepage


  import home page from internet explorer (need to select this option)

how i should suppose to suppress the this prompts.

and also my new package should not delete the older book marks .

support me to handle this case... :(