Today in "ad blockers are Internet security software":
Ars Technica, "Address bar shows hp.com. Browser displays scammers’ malicious text anyway.": https://arstechnica.com/security/2025/06/tech-support-scammers-inject-malicious-phone-numbers-into-big-name-websites/
Malwarebytes, "Scammers hijack websites of Bank of America, Netflix, Microsoft, and more to insert fake phone number": https://www.malwarebytes.com/blog/news/2025/06/scammers-hijack-websites-of-bank-of-america-netflix-microsoft-and-more-to-insert-fake-phone-number
TL;DR: Scammers buy search engine ads linking to legit websites' help pages with a pre-filled help query, but the query bar text is a message to call the fake-support phone number.
Do get an ad blocker.
But probably not one that has less than a 4.0 out of 5 stars in the browser's extension/add-on store.