Hi Firefox for Android does not have any inbuilt parental controls, other than that which you may have installed as an add-on, or have been set by your internet service provider. If you have an add-on that could be blocking content, you can disable or remove it if you follow the details in this [https://support.mozilla.org/en-US/kb/uninstall-firefox-android-add-ons article]. If you have no such add-ons, or they have been disabled, the content is probably being blocked by controls that your internet service provider has in place. You may be able to change the controls, but this is something that you will need to ask them about. If you have any further queries, please come back here and we will do our very best to help.