Hi vishalp Since we can't read minds :-) we need more troubleshooting details to help you: # What model of Android tablet or phone are you using? What version of Android are you using (e.g. Jellybean 4.1-4.3, Kitkat 4.4, Lollipop 5.0, 5.1, etc)? # What version of Firefox for Android are you using? (please try the latest version which is currently FF37.0.1) # What did you do exactly, what happened and what did you expect? (details please! especially the steps you followed around deleting history and sync. I don't think there is a way to restore deleted history from your FF Android from synced history on your Firefox on desktop if that's what you are trying to do) Cheers and happy weekend! ...Roland