WebGL Build Included DLLs

After building in WebGL, the Editor Log indicates that I have 4.1MB of "included DLLs". However, I don't see these listed in the "Used Assets, sorted by uncompressed size:" section of the output.

Is there some way to determine what these included DLL's are?

Are these simply DLLs that Unity must always include in which case I cant (and wouldn't want to) do anything about?

Just trying to minimize build size .... thanks!

 

They should be listed higher up in the Editor Log.

Something like:

Mono dependencies included in the build
Dependency assembly - UnityEngine.UI.dll
(etc)​

 

cool. Thanks!