Lektor - Web Reader (SAPI5) by Web_Embedded

Lektor SAPI5 Web Reader is a powerful yet lightweight Text-to-Speech (TTS) extension designed for users who prioritize performance, privacy, and full control over their browser.

Unlike most web-based readers, this add-on does not send your text or data to external cloud servers (such as Google or Amazon). Instead, it communicates directly with the native Windows SAPI5 interface, utilizing the local voices already installed on your operating system, the default set of which you can expand by installing, for example, IVONA Reader.

• Local Processing (Offline-First): Speech synthesis runs entirely on your machine. This ensures near-zero latency and no extra data usage.
• Privacy-Focused: The extension does not track you, collect statistics, or require an account. What you read stays completely private.
• Seamless Integration: Simply highlight any text on a webpage, right-click to read, or use the clean and simple control overlay.
• Resource-Efficient: By avoiding heavy cloud-based scripts, the extension maintains an incredibly small RAM footprint, keeping Firefox fast and responsive.
• SAPI5 Compatibility: Automatically detects and supports all SAPI5-compatible voices installed on your Windows system.

Perfect for multitasking, proofreading documentation, learning, or as an accessibility tool for visually impaired users.