Intermediate LevelHTML & Semantic Web
What are the security and privacy differences between rel="noopener" and rel="noreferrer"?
❓ Interview Prompt: Compare rel="noopener" (prevents window.opener access) vs rel="noreferrer" (prevents window.opener AND suppresses Referer HTTP header).
1. 'rel="noopener"':
Prevents the newly opened tab from accessing the originating tab's 'window.opener' object, mitigating Reverse Tabnabbing attacks.
2. 'rel="noreferrer"':
Includes all security benefits of 'noopener', AND suppresses the HTTP Referer header, preventing the destination server from knowing which URL the user navigated from.
Code Implementation Example
html
<!-- Suppresses Referer HTTP header and blocks window.opener -->
<a href="https://external.com" target="_blank" rel="noreferrer">
Anonymous External Link
</a>💡Using rel="noreferrer" to block window.opener access and suppress HTTP Referer headers.
🎯 Interview Key Takeaway
Use rel="noopener" for reverse tabnabbing security, and rel="noreferrer" when privacy requires hiding the HTTP Referer header.
#noopener#noreferrer#Security#Privacy#Intermediate
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