If you plan on allowing others to use your Linux Mint machine, the Domain Blocker application may be of use to you. Also known as the Mint Nanny, Domain Blocker allows you to prevent specific websites from loading. Domain Blocker is extremely easy to use, allowing just the basic functionality of adding a domain to block and removing a blocked domain. To add a new domain, click on the Add button and type in the URL. To undo the block, click on the domain name you wish to unblock and then click on Remove. The following screenshot shows the Mint Nanny application, with one domain blocked:

While Mint Nanny can certainly be useful in blocking domains you do not want to visit on your computer, it also has some fairly sizeable weaknesses. First, anyone with the sudo access to your machine will easily be able to undo the domains that you block. In addition, aliases for a domain may not be blocked. For example, if you block www.yahoo.com, the www.ymail.com domain...