CastReader — Text to Speech, Read Aloud + AI by CastReader

3.3 Stars out of 5

CastReader — Text to Speech, Read Aloud + AI version history - 25 versions

Be careful with old versions! These versions are displayed for testing and reference purposes.You should always use the latest version of an add-on.
Latest version
Version 1.2.70
Released Nov 12, 2026 - 53.79 MB
Works with firefox 140.0 and later
Translation now starts with an explicit global switch and stays independent from reading. This update improves comic reading and translation, reduces redundant background requests, and refines account, translation allowance, and multilingual controls. Translated-page tips explain how to restore the original text.
Source code released under All Rights Reserved
Download Firefox and get the extension
Download file
Older versions
Version 1.2.69
Released Nov 9, 2026 - 52.84 MB
Works with firefox 58.0 and later
Translate and listen to documents in Google Docs and books in supported Kobo, Google Play Books and WeRead web readers. Scrolling keeps the current spoken passage and its highlight. Google Docs shows translated text and reading highlights above the page. PDF reading also preserves your place while the next passage loads.
Source code released under All Rights Reserved
Download file
Version 1.2.68
Released Nov 7, 2026 - 52.8 MB
Works with firefox 58.0 and later
Translate webpages, selected text, documents and supported video captions, then listen with synchronized highlighting. Restore original text, control automatic translation and explicitly retranslate a passage. Includes responsive caption layout, reading continuity fixes and localized controls for 28 interface languages in light and dark modes.
Source code released under All Rights Reserved
Download file
Version 1.2.67
Released Nov 3, 2026 - 51.87 MB
Works with firefox 140.0 and later
New four-step Welcome with a real synchronized reading demo, optional Google sign-in and Pro trial, and four reading destinations. Supports 28 interface languages and system light/dark mode. Welcome opens on first installation only; replay remains available in Settings. Improved onboarding measurement and checkout attribution, with optional analytics consent respected. Existing reading, source highlights, scrolling and page-repair improvements are retained.
Source code released under All Rights Reserved
Download file
Version 1.2.66
Released Oct 30, 2026 - 51.67 MB
Works with firefox 140.0 and later
Kindle reading improvements
- Faster local English recognition with a lightweight OCR model, retaining original-page word and paragraph highlights.
- Preserve recognized words when a neighbouring glyph is missed; partial recognition is not reported as an empty page.
- Prevent repeated or outdated partial-recognition notices during page transitions.
- Retire old playback and page cues when font size or layout changes.
- Continue Kindle reading when switching browser tabs, with the current page and highlights shown on return.
Source code released under All Rights Reserved
Download file
Version 1.2.59
Released Oct 14, 2026 - 45.03 MB
Works with firefox 140.0 and later
Reading reliability improvements:
- Wattpad starts with all currently rendered chapter content in order and keeps reading across same-chapter page-position changes.
- More accurate word highlighting around Wattpad comment controls.
- Cleaner article extraction on Archive of Our Own, Robotik Produktion, and IranianUK.
- Reading controls return to idle after the article finishes.
- Clear recovery messages for unavailable cloned voices.

Persian read-aloud remains unsupported; this update does not add a new language.
Source code released under All Rights Reserved
Download file
Version 1.2.56
Released Oct 11, 2026 - 44.95 MB
Works with firefox 140.0 and later
CastReader 1.2.56 improves the localized names and descriptions of the Firefox extension.

• Clearer text-to-speech, read-aloud, PDF and EPUB descriptions across the supported languages.
• Reading repair keeps links to the original text and requires a real synchronized reading trial before a fix can be confirmed.
• The interface retains 28 languages, with synchronized highlighting and automatic scrolling. Voice cloning and OCR have their own language coverage.

Kindle Web compatibility depends on the book edition. PDF/EPUB files must be supported and accessible; EPUB books must be DRM-free.
Source code released under All Rights Reserved
Download file
Version 1.2.55
Released Oct 10, 2026 - 44.95 MB
Works with firefox 140.0 and later
CastReader 1.2.55 expands the interface, reading and explanation tools to 28 languages.

• New language voices include portraits, previews, favorites and free/Pro choices.
• OCR language data downloads when needed and runs locally, with verified downloads and cached reuse.
• Improved language detection across webpages, supported ebook readers and uploaded documents.
• Reading and AI Explain retain synchronized highlighting and scrolling, including right-to-left text.
• Fixes for PDF opening, highlight alignment, playback conflicts and explanation recovery.

Voice cloning and OCR have their own language coverage. Kindle Web compatibility depends on the book edition.
Source code released under All Rights Reserved
Download file
Version 1.2.54
Released Oct 6, 2026 - 14.2 MB
Works with firefox 140.0 and later
- Read and explain Dutch, Russian, Korean and Arabic with 15 named Google WaveNet voices, portraits and the familiar free/Pro voice picker.
- The package now includes 13 UI languages. Arabic controls use RTL without changing the source document direction.
- More consistent language detection across pages, selected text and documents, with manual correction. Long EPUBs sample the book body so an English copyright preface does not override its language.
- Fixed Arabic word highlighting around diacritics and added right-to-left reading and explanation marks.
- OCR data for the new languages downloads on demand and stays cached locally.
- Includes the reading selection, repair and correction features from 1.2.53.
The four new languages use standard voices. Personal voice cloning retains its existing language support.
Source code released under All Rights Reserved
Download file

CastReader — Text to Speech, Read Aloud + AI by CastReader

Latest version

Version 1.2.70

Older versions

Version 1.2.69

Version 1.2.68

Version 1.2.67

Version 1.2.66

Version 1.2.64

Version 1.2.63

Version 1.2.62

Version 1.2.61

Version 1.2.60

Version 1.2.59

Version 1.2.58

Version 1.2.57

Version 1.2.56

Version 1.2.55

Version 1.2.54

Version 1.2.53

Version 1.2.52

Version 1.2.50

Version 1.2.49

Version 1.2.48

Version 1.2.46

Version 1.2.45

Version 1.2.44

Version 1.2.43