Rewrote "Best practices for extensions" (#3577)

* rewrote article

* link Featured

* reseq intro

* Update microsoft-edge/extensions/developer-guide/best-practices.md

---------

Co-authored-by: Patrick Brosset <patrick.brosset@microsoft.com>

Author: mikehoffms

microsoft-edge/extensions/developer-guide/best-practices.md

@@ -6,24 +6,87 @@ ms.author: msedgedevrel
 ms.topic: conceptual
 ms.service: microsoft-edge
 ms.subservice: extensions
-ms.date: 11/20/2023
+ms.date: 09/22/2025
 ---
 # Best practices for extensions
 
-Follow these Best Practices to implement your extension and list it at [Microsoft Edge Add-ons](https://microsoftedge.microsoft.com).
+Follow these best practices to implement your extension and list it at [Microsoft Edge Add-ons](https://microsoftedge.microsoft.com).  Build an extension that conforms to Microsoft's standards for security, privacy, performance, and user experience.  These principles help ensure your extension is safe, reliable, and valuable to users.
+
+The Microsoft Edge extensions team continues to gather feedback from developers and users to evolve these best practices.  To ensure that your extension remains compliant and competitive, review this guidance regularly.
+
+Meeting these guidelines doesn't guarantee that your extension will receive the **Featured** badge; see [The Featured badge](../index.md#the-featured-badge) in _Overview of Microsoft Edge extensions_.
+
+Follow these best practices, to improve the quality, reliability, and user experience of your extension, and to maximize your extension's visibility.
+
+
+<!-- ====================================================================== -->
+## Security
+
+* Make sure that your extension doesn't pose any security threats to users.
+
+* Request only the permissions that are necessary for core functionality.
+
+* Use secure coding practices, and avoid third-party libraries with known vulnerabilities.
+
+* Respond promptly to any flagged issues.
+
+
+<!-- ====================================================================== -->
+## Privacy
+
+* Handle user data responsibly and in accordance with your published privacy policy.
+
+* Clearly disclose what data is collected and how it is used.
+
+* Avoid tracking or fingerprinting users without explicit consent.
+
+
+<!-- ====================================================================== -->
+## User experience
+
+* Provide a clean, intuitive, and responsive interface.
+
+* Avoid disruptive ads, pop-ups, or misleading prompts.
+
+* Ensure the extension integrates seamlessly into the browsing experience.
+
+
+<!-- ====================================================================== -->
+## Store listing
+
+* Provide clear and concise descriptions, to set accurate user expectations.
+
+* Include high-quality screenshots that reflect the actual user experience.
 
 
 <!-- ====================================================================== -->
-## Design a high-quality extension
+## Performance and stability
 
-Build an extension that conforms to Microsoft's standards for security, privacy, transparency, and user experience.
+* Minimize background activity and memory usage.
 
-**Security**: Make sure that your extension doesn't pose any security threats to users. 
+* Avoid crashes, freezes, or excessive CPU consumption.
 
-**Privacy**: Make sure that your extension handles user data appropriately. 
+* Test your extension across different versions of Microsoft Edge and supported platforms.
 
-**User experience**: Make sure that your extension provides a clean, intuitive, and seamless user experience on the web without ads that can be interruptive.
+* Refer to [Minimize an extension's impact on page load time](./minimize-page-load-time-impact.md).
+
+
+<!-- ====================================================================== -->
+## Responsiveness to user feedback
+
+* Monitor user reviews, and respond constructively.
+
+* Address bugs and usability issues in a timely manner.
+
+* Maintain a regular update cadence, to improve reliability and user trust.
+
+
+<!-- ====================================================================== -->
+## See also
+<!-- all links in article -->
 
-**Store listing**: Make sure that your extension's store listing sets correct user expectations and clearly communicates what the extension does.
+* [The Featured badge](../index.md#the-featured-badge) in _Overview of Microsoft Edge extensions_.
+* [Minimize an extension's impact on page load time](./minimize-page-load-time-impact.md)
 
-We'll continue gathering input about Developer experiences with extensions, and updating these Best Practices.
+External:
+* [Microsoft Edge Add-ons](https://microsoftedge.microsoft.com)