Inject a div via URL?

[Mat]

As a specific question in this more general, I'm wondering how to inject a div - or actually a tiddler - into the displayed TW, via the URL browser address.

The point is to enable me to access an external TW but display a tiddler with my own content, e.g some aggregated list or so.

I believe it should be doable because it is possible to, via the URL address, directly create+present a div. For example an URL set to 

data:text/html, <div contenteditable style="width:500px; height:500px; border:1px dashed blue">

creates a directly editable div in the window. It is also possible to write in e.g json directly in the url and have it display in the window.

....Soooo... can this be merged with the TW url to e.g prepend the tiddler river with that div? I mean, without manipulating the source TW.

Thanx

<:-)