is malwarebytes safe to use

Yes, if you get it only from the developer's site:

Free Cyber Security & Anti-Malware Software | Malwarebytes

Some unscrupulous download hosting sites are posting it but those kinds of sites too often include something your do not want on your computer. Go with the real source linked above.

We senior contributors here have all known Malwarebytes' developer for many years and respect his contributions to this community. He is a gentleman of quality and that reflects in his work.

Malwarebytes is not antivirus software as there are no known viruses for Macs. It is designed to detect and remove adware and malware.

the problem is that many people don't fully understand in what way a virus, malware, addware, trojan and the likes differ

safefinder fall into the category of browser hijack

a virus would be able to spread outside of just the browser

Yes.

Someone commented about Mac not having viruses.

What about Safefinder or any search manager?

I have had this virus twice.

Now I can't find it b/c it can be hidden inside another download.

Thank you for clarifying the difference. How do I get rid of a browser hijack?

How to remove Safe Finder search (Virus Removal Guide)

Today, August 15, waited 20 minutes for Support Chat and after that they were of no help. Malwarebytes says to contact Support and when you do, NO support.