This link will help you https://blog.mozilla.org/blog/2014/09/02/make-firefox-for-android-yours-switch-languages-easily-customize-home-screens-and-clear-history/ http://mzl.la/LnnpCM

This doesn't solve my problem , pocket is not a platform for tablets

Hi Davebear7, If a website gets added to your top sites and you don't want it to be there, try holding down it and when the menu appears, press "Remove". If you want to stop the websites you're browsing from showing up under Top Sites in the first place, try [[Private Browsing on Firefox for Android|using a Private Browsing tab]] or [[Share your Android device with a Firefox Guest Session|start a guest session]]. Hope that helps, Jayelbe