Chrome and Safari replaced by generic "search" broswer

That's probably a search-redirect that may pose problems for you.

• How To Remove ChumSearch.com redirect from Mac (macOS Guide)

The initial idea in the above, is to use manual methods to find/remove

the ChumSearch; after those, see the link below to get MalwareBytes

and/or Etrecheck. Manual methods may work for browser extensions.

Look into extensions in your browser to see where it leads. There

area a few known 'bad browser redirects' some use extensions in

Safari or Chrome. The following (link) removes adware etc. This was

created by a contributor to these ASC discussions in good standing.

This can work, runs for free (in limited form after initial trial) & can help:

Malwarebytes for Mac — Mac Antivirus Replacement | Malwarebytes

Another product from Etrecheckcan resolve issues, create reports,

and these can be used to remove several kinds of problematic items..

Also has free limited version; I have each, malwarebytes + etrecheck.

Both of these were created by fellow Apple support contributors.

Please use the manual uninstall only.

https://www.2-spyware.com/remove-bing-redirect-virus.html

How to get rid of Bing.com Redirect - Virus removal guide