small tool to replace string from selected gameobject names,download from here and place into Assets/Editor/ folder:https://github.com/UnityCommunity/UnityLibrary/blob/master/Assets/Scripts/Editor/BatchTools/ReplaceCharacterInGameObjectNames.cs Then you can use it from Menu: “Tools/Replace Characters in GameObject Names” ^This would rename “Cube|aaa” into “Cube@aaa” and so on.

Building brotli compressed webgl release can take hours (if you have large 3d models in the project..), and you cannot do anything with the project while unity is compressing it. Solution:Make (really fast) uncompressed builds from unity,then compress the webgl data files manually from commandline! […]