I'm sorry, I'm not sure what you mean by "fixture". Firefox has these two main kinds of history: * browser history - addresses of pages you have viewed * form and search history - text you typed or pasted into forms in Firefox or in the address bar for searches In Firefox for Android, you can clear these and other categories of private data any time using menu > Settings > Privacy > Clear now. Please see this article for more information: [[Clear your browsing history and other personal data on Firefox for Android]]. Can you find what you're looking for?