Tried it, and you are right about experimental being gone.
I tried signing into google and got a message about browser doesn't support Javascript. Gave up.
I got there just by searching directly and it works. I wish the reader mode had an option to make it work like a book though, web scrolling is a nightmare on this thing.
You can turn JS on or off from settings, but IMO having limited support is a feature. The average site would wreck havoc on a Kindle's processor and battery life if it could run all scripts normally.