This requires you know the URL you want, and have the ability to cut, (how can anyone live without this?) see your address bar (not your search bar!), paste, and load without your paste being altered. You don't need to be able to read the source of the blocked content (though it gives you something equivalent to the ability to write it).
How anyone can manage to go for even a dozen pages without viewing the source of a page is beyond me. (Or disabling styles for that matter...)
I tried to be fancier; I did not succeed. This, however it looks, however awkward the interface, works. I decided to call this... application FWG* for fuck Web Guard. Go there and paste your URL.
N.B.:This self-contained version of the tool, alas, does not have the option of entering a URL. A tip of my hat to Mr. Simon Willison for the elegance: I was more envious until I noticed the Tumblr trick. Still, nice. Sure wish I could have, or you had, figured out the url functionality no one else seems to include...
No one except the venerable Ian Hickson, my hero, who wrote the underlying utility, which changed my life. Seriously. Thanks Hixie.
Be seeing you.