Works like a charm for me, saves my having to read the browser by highlighting text and pressing a button! Doesn't get much better than that...

UPDATE: Broke with the last Windows Update, prevents highlighting to right click then copy/paste. Have submitted a detailed bug report and disabled the extension. Also it would be nice if the speaker button was less obtrusive and had more of an offset from my cursor and text. It gets in the way! Please take time to work on this extension and possibly improve on it with speed and pitch options. I'm going to miss it.