search engine bar

Would you please describe issue in more details? Where do you see this search.speedtest. I would appreciate the screenshot. Press cmd+ shift+ 3 and post the picture here.

also try this: Click on Safari menu at the top/preferences/ search/ change your search engine.

If Safari is not affected, you may have installed a malicious Chrome extension such as "Adblock Super" or "News Ticker Remover." Remove all extensions you don't know you need. If in doubt, remove all of them.