This was actually a coding challenge I guess. Basically what we are asked to do is to read some captchas created with javascript and canvas and submit them pretty fast. We did it with GreaseMonkey extension for firefox that allowed me to save some really annoying parsing magic. Basically what was done is hooking CanvasRenderingContext2D.prototype.fillText function so we can access to the char that has to be drawn and its x axis value.