AndarielHalo said:
"javascript: var imageLink = document.getElementsByTagName("a"); for (i = 0; i < imageLink.length; i++) if (/\/post\/show\//.test(imageLink[i].href)) imageLink[i].href = imageLink[i].firstChild.src.replace(/preview\//,''); alert('done');"

This is not working on my firefox.

FFS, stop bumping this old thread already and use the other tool. Homo already pointed out the problem with my quickfix. I could throw in a few more lines to generate different extension variations (png, gif, swf) for every thumbnail to cover all the bases, but it isn't worth the effort.

If it still matters to you, the site HTML has changed since then for whatever reason. Replacing "firstChild" with "childNodes[1]" fixes your problem.