I have a web site that allows you to view sites in a window (actually an Iframe). It was intended for web designers to test their sites on specific display sizes. Anyway, the point is I've added the ability to specify a suffix, which is added to any URLs you input. The feature is not normally displayed. You need to use the URL:
You are then presented with a URL input field and, beneath it, a field labelled "SFX". Put the suffix you require here and it is automatically added to any URL you input.
Note: This will not in any way hide your identity. It just allows you to set a suffix that is added to any url you type in.
Please let me know how it goes...