Hi,
Windows Security still blocks known malicious files and phishing attempts system wide. In addition to that, each browser implements its own security measures to safeguard users from online threats and vulnerabilities. That said, if you want additional security measure to have protection on those browsers, you can install an antivirus extension. Here are some of the antivirus extensions available:
For Chrome/Brave/Opera:
https://chromewebstore.google.com/search/antivirus
For Firefox:
https://addons.mozilla.org/firefox/search/?q=antivirus
Also, it’s a good idea to install an ad blocker to reduce the risk of accidentally clicking or being redirected to suspicious sites. One of the most reliable options is uBlock Origin, which you can find on the pages mentioned above.
Disclaimer: These are non-Microsoft sites. The content appears reliable, but stay cautious of ads. Always research products before downloading.