> > I'll try to explain what I want to accomplish one more time: > > in this site: > http://www.etrader.co.il/jsp/currencies.jsf?assetSel=2 > > In the middle of the screen there is a value (1.3...) colored red. > The value changes every few seconds, and I wanted to copy this value > to my application every time it changes. > > I thought about copy the source-code of this website every few seconds and > look for the current > value in it, but unfortunately the value doesn't appears in the > source-code. > I guess you never worked with JavaScript before? To get the value you don't need Firebug. You can access it via document.getElementsByClassName("text_red_12_bold").item(0).textContent. Try it out by typing it into the Command Line<http://getfirebug.com/wiki/index.php/Command_Line>and hitting Enter. Your extension just needs to execute the abovementioned command on the website to get the value and then export it using the API you mentioned or the Firefox internal API. But doesn't that website offer an API to get the values directly?
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