Subtitle Master
Subtitle Master is a lightweight and efficient browser extension that lets you search and download subtitles instantly using the official OpenSubtitles API.
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Subtitle Master is a lightweight and efficient browser extension that lets you search and download subtitles instantly using the official OpenSubtitles API.
Subtitle Master is a lightweight browser extension built using Manifest V3 and designed for secure, fast subtitle search and download through the official OpenSubtitles API.
The extension does not collect, store, or transmit any user data. All API requests go directly from the user’s browser to the OpenSubtitles API. No analytics, tracking, or telemetry is included.
Architecture Overview:
Manifest V3 with a module-based background script
popup.js handles UI interaction, search input, and rendering results
All dynamic HTML output is sanitized using DOMPurify
downloads API is used only to deliver subtitle files requested by the user
No remote code, no eval-like functions, and no inline JavaScript
Not dependent on any external frameworks except DOMPurify (bundled locally)
Notes for Reviewers:
The extension requires an OpenSubtitles API key to perform subtitle searches. No user login is needed.
No user data is collected, saved, or transmitted at any point.
The extension works purely as a client-side tool and does not communicate with any third-party server other than OpenSubtitles.
If any additional test details are needed, feel free to request—happy to provide.