You have to own the original GBA cartridge memory to run the NDS Browser on your NDS.Right?Is there any possibility to run a browser on the R4(Official or not)without the cartridge?
You do not need the original GBA add-on cart. You do need a slot 2 cart though.
I tested/patched it for Supercard Mini SD and works ok.
[EDIT]
The patcher files: http://gbatemp.net/index.php?download=525
With 3rd-party memory expansions (eg the ez-flash V 3-in-1).
Not possible without any slot-2 device at all. You could use something like the DSOrganize web browser.