How can I remove tohotweb.com homepage from Safari

Hello Jennifer.
Is that a Mac computer you are using? Please have a look at the steps provided in this article https://support.apple.com/kb/PH19286?locale=en_US&viewlocale=en_US to change the homepage settings in your Safari. Thank you.

I do not know when and how this search engine becomes my default homepage. My AVG does not report it. I google the name and find many posts like introducing it as a malicious browser hijacker. What should I do now?

Hello Jennifer.
Is that a Mac computer you are using? Please have a look at the steps provided in this article https://support.apple.com/kb/PH19286?locale=en_US&viewlocale=en_US to change the homepage settings in your Safari. Thank you.