Details: https://mathiasbynens.github.io/rel-noopener/ https://twitter.com/iammerrick/status/914988292637990912 …
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What would break if window.opener is not true by default?
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Some Web content relies on it.
@bz_moz has some horror stories to tell. - 2 more replies
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JavaScript, HTML, CSS, HTTP, performance, security, Bash, Unicode, i18n, macOS.
Always use rel="noreferrer noopener" linking to another site with target="_blank". Or else that site can silently redirect your users!
