hello! hmm that's odd? I know on chrome it takes a bit to load, at least from my testing? also with firefox i looked through unity forums and I saw this:
"Type this in the firefox searchbar about:config and search for
security.fileuri.strict_origin_policy It is true by default, you can set it to false.
“If you do development with local files and need to be able to retrieve other local files, you may need to set this preference to false. Otherwise, leaving it set to true offers the most security”
Maybe this helps. at least it helped me."
idk why if its just a unity thing or if its something on our end but its something we'll look into for sure, if this doesnt work let me know ill see what I can do, super sorry ;-;