That was a little lazy. Once again: The web page discussed here does not crash for me.
Checking it on my desktop computer (Linux/Firefox) it didn’t crash either, and it did not take too much RAM, a few 100M iirc.
The same happened earlier with this site, and for me this post fixed it reliably.
In other words, the page discussed here not crashing my phone might have something to do with having previously applied these settings. Try it.