Edit: They fixed it within the week. Review changed from 3 to 5 stars.

Would usually give it higher stars but it's stopped working on Firefox mobile since the last update (Jan 2024). I have reported and it's been a couple days so I'm reviewing to raise awareness.

Does not work at all. It crashes immediately after selecting the addon.

No Farsi? Language spoken in Iran & Afghanistan.
Please Add Persian language too. It is the same alphabet as Arabic - different pronunciation.

Great plugin which also reads PDFs. Google login to use premium voices works fine for me. Make sure to select one of the Google Translate voices somewhere at the bottom of the selection box.

In theory great, but it doesn't even allow me to log in to use premium voices on Android. The login button just doesn't do anything.

It works. Choose voice and speed of narration. I use it for EPUB files.

TL:DR - I personally find MS Zira voice with 75% speed, 100% pitch, to be good enough for most scenarios. Default settings sound horrible, but can be tweaked, that is what I mean.

Okay overall with all things considered, this is currently among the most easy to use TTS (Text to Speech) addons

Pros:
- Easy to use, works fine with a google translated page, easily identifies what you want to read

- You can use Google Wavenet, Amazon Polly & IBM Watson voices with it, if you have API access (all 3 of them have a free tier)

- Has a dark background pop-up that shows the text in a simple readable format alongside speech

Cons:
- Biggest con is that it doesn't use the new Microsoft voices that come with Windows Narrator. It only uses the old Zira, Adam, voices which are of lower quality.

- No way to add a custom Offline voice model. The option of 'Custom Voice is for the online APIs'

- I heard somewhere, that even in offline mode, it does uses some google apis, but haven't checked myself. Given it is recommended by Mozilla officially, I guess its alright for non-security scenarios.

This is a great plug in. Request developer to add open AI TTS support.