If you can't find anything let me know, it's about 15 minutes work to make something like that.
I tend to subscribe to Apple's philosophy of trying to avoid adding configurable options unless absolutely necessary, but frankly, that position can be a tough sell to early adopting Android users.
Anyway, again, this is a very awesome and useful app.
I'm trying use Link Bubble in incognito mode, but some sites aggressively check that they can set cookies and fail if they can't (e.g. nytimes.com). I'd like the option to directly kick those links to my main browser, rather than hoping I catch them in Link Bubble before they've redirected to the error page.