Quite good; for Firefox you'll have to dig-in and choose the non-robotic voices, i.e. google Translate XX or Amazon / MS premium voices.
The UI could be improved, for example highlight directly what is read on the page, in complement to the popup.

what a shame voice in 2025... better hitting to a metal can...

Oh just super useful extension! great work over here! T wailer !

⭐️⭐️⭐️⭐️⭐️ Read Aloud: A Text-to-Speech Voice Reader – Listen to the Web with Ease

The Read Aloud Firefox extension is a fantastic tool for converting text into speech, making it perfect for multitasking, accessibility, or simply giving your eyes a break. It integrates smoothly with Firefox, allowing you to listen to articles, blog posts, or even PDFs with just a click.

Pros:
✅ Clear, natural-sounding voices: Offers a range of high-quality voices, including free and premium options.
✅ Flexible customization: Adjust the speed, pitch, and volume to suit your preference.
✅ Supports multiple languages: Great for multilingual users or language learners.
✅ PDF and eBook support: Reads directly from documents, making it versatile.
✅ Easy controls: Simple play, pause, and skip buttons for seamless listening.

Cons:
❌ Limited free voices: Some of the best, most natural voices require a premium subscription.
❌ Occasional mispronunciations: Like all TTS tools, it sometimes stumbles on unusual names or complex words.

💡 Overall, Read Aloud is an excellent Firefox extension for anyone who wants to consume written content through audio. Whether you're tackling long articles, studying, or enhancing accessibility, it’s a powerful and reliable companion. Highly recommended!

Default voice is terrible, can't understand anything

Only one speed of speech availiable and one unique voices to choose.

I have tried loading several times but always get the message in red, "Missing host permission for the tab". Cannot us it.

Va molt bé en gairebé totes les webs, i parla català

It's not ergonomic and intuitive on Android smartphone at all...