[Speed] Adds features that modify content (#17453)

* Adds features that modify content

* Update src/content/partials/speed/brotli-compression-warning.mdx

Co-authored-by: Jun Lee <[email protected]>

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Co-authored-by: Jun Lee <[email protected]>

Author: angelampcosta

src/content/partials/speed/brotli-compression-warning.mdx

@@ -12,6 +12,8 @@ Even when using the same compression algorithm end to end (between your origin s
 - [Mirage](/speed/optimization/images/mirage/)
 - [Polish](/images/polish/)
 - [Rocket Loader](/speed/optimization/content/rocket-loader/)
+- [JavaScript detections](/bots/reference/javascript-detections/)
+- [RUM](/speed/speed-test/run-speed-test/#enable-real-user-monitoring-rum)
 
 To disable these settings for specific URI paths, create a [configuration rule](/rules/configuration-rules/).