Jayderyu, just don´t bet on it.
Since I remember, I just removed the warning script from index.html and they worked locally without hassle in any browser, and also on my html5 exe wrapper. I asked here just because I thought it was documented somewhere and assumed I missed it.
If it was an undocumented or unintentional feature, then probably no one noticed it other than me. Yesterday I installed the latest version and I noted the change.
Seems I will have to roll back to that older version.