Thank you for this. Using Firefox 57.0.4 and mostly reading mail. I tried it on reading a news article and other things and it worked. I would rather listen while I do other things than sit at the computer and this lets me do that. Many thanks.

I wondered whether it is possible to get the add-on work natively in Linux?
In meantime I use this online reader: https://ttsreader.com/

Does not work with Fire Fox Quantum 57.0.2 (64-bit).

At all.

FF 60.0.1 broke reading pdf's. Web pages read fine. On pdf's, the apps shows enabled, but when highlighting text and right clicking, the context menu shows the app but when selecting it to speak, nothing happens; the pause and stop buttons do not show up and there is no sound. I am dependent on this tts app so please help and take a look at it. Thank you.

Does a pretty well job, in contrast with its competition as it allows more options in regards of voice rate, pitch and volumen in the settings, unlike others.

Sorry, doesn't work for me. enabled: but no sound.

It worked beautifully before Firefox quantum, but now it's not generating sound. So please tell me if there is any problem from my side or the add-on is not totally prepared for Firefox quantum. I gave it 5 star in the hope that it will work fine just like before.