The deep web is accessible by many of the conventional browsers. You can use chrome, Firefox and Mozilla to access it. However, TOR is a protected browser, which helps you browse the deep net anonymously. It is not safe to browse the deep net without significant protection on your device and an understanding of the basic codes.
This is because the deep net is crawling with viruses and hackers that can easily hop on your ip address and on to your device to hack it. you can potentially lose your device and all your personal data in the process.