Mobile browsers that are not shit

Do they exist?

I am looking for one, that:
1. Do not reload page every time I switch tabs
2. Includes JS debugger
3. Don't changes text size randomly
4. Is OSS
5. Allows ``real'' zooming (fixed/absolute positions must be constant relative to the page, not to the screen)

Any suggestions?

Chrome's JS debugger is pretty awful to use even on a 15 inch laptop screen. I can't even imagine how horrible it (or any debugger really) would be on a 6 inch screen with a touch interface and software keyboard.