Thanks for the detailed instruction to get the browser running. The selection of objects is great!
An observation:
Load a Cosmos object and import it. The proxy is scaled to "10" in X, Y and Z, but this gives it the proper and expected size.
Now "Dupilcate to Mesh". The created mesh is scales to "1" in X, Y and Z, but this also means that humans, for example, are less than 20 cm tall (great if you plan to shoot the next hobbit movie).
Btw, a scale other than 1,1,1 is undesired in C4D in general, at least for objects in their original state.
PS
Would it be possible to store the downloaded objects under their name (and import them in the scene under this name as well)?
So the "Bus 005" gets saved under that name and also appears under this name in the scene, so we don't end up with several dozens of objects named "Corona Proxy"?