LeechBlock: Free Firefox Parental Controls Add-on
LeechBlock is another parental control add-on for the Firefox browser that can be customized like ProCon Latte. You can download LeechBlock from the authors' website or from the Mozilla add-on website.
With LeechBlock, all you need to do is answer three questions before you decide to restrict the kids online: What to block?, When to block? and How to block?.
Example: If you decide to block a social networking site, like facebook.com or myspace.com, enter it in the LeechBlock options. Enter as many domain names as you wish to block, but input only one website address per line.
Next, proceed to enter the time periods when LeechBlock blocks the sites e.g. from 1000 hrs. to 2400 hrs, or all day. You can also choose to block websites on certain days or every day.
Finally, choose how the blocking message will be displayed. For example, sending them to another website or your family photo album online. You can also just show the default local blocked page that LeechBlock has as a default message: Another option in using LeechBlock is to disallow anyone without a password from disabling or uninstalling the Firefox parental controls add-on.