Most of the new features are built-in.

Google usually bundles more than a few new features with each iteration of its browser, and Chrome 79 should add some fairly substantial performance and security improvements, including alerts if your password has been stolen.

The additional features include phishing protections and tab freezing, which will try to mitigate Chrome’s voracious appetite for memory by limiting what actions a tab can take when not in use.
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https://www.pcworld.com/article/3489420/google-chrome-79-new-features.html