It's an extension for existing customers, and it's actually quite good. If you look at the reviews, they're mostly negative, but that's because people think it's a free extension, which it ISN'T. Ignoring that, it's a good tool.

If you need a free extension, this isn't for you.

i need an account to read, but i cant make an account. So its useless

obligation d'inscription et ne foncionne pas ..

you have to login to their app to use this app??? wtf

Несовместим с Firefox 87 для Android.

Implement options to read the complete page from start to finish.

To use it, it forces you to log in (create an account) on the app's website. Also, it is not activated on selected texts within a text area. doesn't work that way. When it run without imposing conditions, I will try again. For now I will uninstall it from my browser.
Para usarlo, te obliga a iniciar sesión (crear una cuenta) en el sitio web de la aplicación. Además, no se activa en textos seleccionados dentro de un área de texto. no funciona de esa manera Cuando se ejecuta sin imponer condiciones, lo intentaré nuevamente. Por ahora lo desinstalaré de mi navegador.

Works great...use with your ReadSpeaker TextAid account (or from when you sign-in to your school's system with their TextAid account).