in opened applications?
I want to automate firefox in some web page and I don't have a way to "know" if the page already load completely or if it still loading...
I was thinking about making an OCR to check the status bar... it's difficult ?
For example, when the word DONE appears at the status bar, the program continues to the next command...
OCR is a terrible, terrible choice for something like this. Use OCR when you are encountering images with unknown text. If you are trying to automate Firefox, there's a billion better ways of doing so. Check out something like AutoIt or any one of a hundred automation tools for Windows. Or write a custom Firefox extension. Either one of those will be far easier to implement, more reliable, and more performant than OCR.
Maybe http://groups.csail.mit.edu/uid/sikuli/ is what you want