Found one thing that would also be nice to have. I see the tease stores the volume, would be nice if it also stored whether the random dialogue thingy is enabled or not. So you don't have to disable it by hand every time you open the tease.

One thing I will try when I have time is to create a "low-quality" mode with smaller image file sizes and see if that improves things for some people.

The images are already pretty small, 150kB per image should be completely fine. It's most likely the audio files, I'm seeing Firefox allocated ...