-e: with 5.0 a lot of things get stored in a Temp folder inside the project folder. the bug reporter zips all of this up resulting in a really big upload size for the project.

webgl and new global illumination are storing stuff in that folder afaik

-repro:
--make new scene
--save it
--build for webgl
--after build is done open bug reporter and notice size for attached project
--close reporter
--delete Temp folder contents in project folder
--start bug reporter again
--NOTICE actual project size is much smaller