parolu is a Browser software developed by traduku.net. After our trial and test, the software is proved to be official, secure and free. Here is the official description for parolu:
BrothersoftEditor: Parolu enables Firefox to do speech synthesis of web pages written in Esperanto, useful for the blind and for language learners. Press F9 (or Tools/Parolu/.../enhavon) to read the whole PaGE aloud (Firefox may slow as text is processed), or, control-F3 for the next sentence, control-F2 for the previous sentence, control-F1 to return to the start.
You first need to install the free Mbrola speech engine on your machine. To do this, go to http://tcts.fpms.ac.be/synthesis/mbrola/mbrcopybin.html and install the MBROLA binary into C:\Program Files\Mbrola Tools, then Copy an MBROLA Polish Voice into C:\mbrola\pl1 such that the voice file itself is at C:\mbrola\pl1\pl1 and when Mbrola first runs and asks for your Default database just enter C:\mbrola\pl1\pl1 you can free download parolu 0.3.1 now.