Hello, Thank you for contacting Mozilla. I understand that you are having problems with clearing data on Firefox for Android. In order to better understand and investigate on the issue that you are encountering, please reply to this message with the following information: * What is the type of phone you have? (Manufacturer, and model) * What is the Android version of the device? * Please provide the exact steps to reprodcuce the issue you are encountering. Please be sure to include as much detail as possible, including any websites that may exhibit this issue, and any error messages that you may be receiving, exactly as they appear. This will ensure that we will have all the information needed to investigate into this. Thank you for your help and we look forward to hearing from you!