On the top right corner of the webpage of IF you will see a round picture along with the search sign, message sign and notification bell icon. Click on that round picture. You will come across a drop down menu. On the top you have the option "Settings". Click on that. You will be lead to a page where you can change your profile settings. Choose the option "Update Profile". Then you will see change password option below edit profile. Click on that and change your password.