While updating the copyright to include 2007 on this site I reread all pages. Looking at my own retest again made it look a bit akward. The three boxes 1. regex, 2. text and 3. result seemed now in the wrong order. So I did swap regex and text and while looking through the whole thing did some minor tweaks mainly regarding the layout. Anyway, I did put a new retest 0.6.1 online.
During testing I found the accesskeys like ALT-T did not work in Firefox. I am quite sure they did work in the 1.0 or 1.5 release of Firefox. A quick googling (sadly no hint in the Firefox help?) did show that Firefox uses SHIFT-ALT for accesskeys. A bit akward but still working.