Search.macsafefinder.com by Mac Safe Finder is a dubious search engine. It is built to drive traffic to their search engine for revenue thru clicks and paid advertisements. It is recommended to always read the Terms and Agreements and EULA’s before installing software on your computer. Mac Safe Finder is most likely bundled with free software you download off the internet from various (often dubious) sources.
Do never click too fast thru an installation process using the “Next” or “OK” button. If you do so, you might agree to software you might not want to install. If the installer “Download Client” offers an Advanced or Custom option button, click it to find out if there is any other malicious software offered and installed during the installation process.