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ASS Subtitle Player version history - 14 versions

ASS Subtitle Player by Kerim Demirkaynak

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ASS Subtitle Player version history - 14 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 2.3.4

    Released Oct 8, 2026 - 42.7 KB
    Works with firefox 142.0 and later, android 142.0 and later
    • Fixed the subtitle file picker being affected by website CSS.
    • Isolated the picker with Shadow DOM for consistent styling.
    • Fixed sizing issues caused by different box-sizing rules.
    • Prevented inherited fonts, spacing and button/input styles from affecting the picker.
    • Fixed positioning issues caused by body transforms and zoom.
    • Improved picker sizing on narrow screens.
    • Preserved fullscreen picker behavior.
    • Includes all subtitle positioning fixes from 2.3.3.

    Source code released under MIT License

    Download Firefox and get the extension
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  • Older versions

    Version 2.3.3

    Released Oct 8, 2026 - 42.41 KB
    Works with firefox 142.0 and later, android 142.0 and later
    • Fixed subtitle positioning on videos with different aspect ratios.
    • Added accurate video content area detection for letterboxed/pillarboxed videos.
    • Fixed \pos/\an, text wrapping and subtitle width calculations.
    • Fixed mobile subtitle sizing to scale relative to the video instead of the screen.
    • Improved vertical video detection in auto mode.
    • Applied the fixes to secondary subtitles and overlay mode as well.

    Source code released under MIT License

    Download file

  • Version 2.3.2

    Released Oct 8, 2026 - 41.69 KB
    Works with firefox 142.0 and later, android 142.0 and later
    • Improved error handling with retry logic and error codes.
    • Fixed ASS subtitle positioning and font size scaling.
    • Improved support for \pos, \an, \fs, PlayRes and legacy SSA alignment.
    • Improved subtitle shadow rendering and reduced pixelation on desktop and mobile.
    • Moved the subtitle file picker to the top-right of the page, including iframe and fullscreen support.
    • Fixed Reset All Settings causing malformed subtitle rendering.
    • Reset now applies default/site settings without reloading the extension.
    • Fixed various edge cases with ASS/SRT subtitle rendering.

    Source code released under MIT License

    Download file

  • Version 2.3.0

    Released Sep 16, 2026 - 38.06 KB
    Works with firefox 142.0 and later, android 142.0 and later
    • Fixed an issue where only the first simultaneous ASS Dialogue line was rendered.
    • Added support for rendering multiple overlapping ASS subtitle lines at the same time.
    • Added \pos(x,y) positioning support.
    • Added support for ASS PlayResX and PlayResY coordinate scaling.
    • Added support for [V4+ Styles] Alignment values.
    • Added support for \an1–\an9 alignment override tags.
    • Added support for legacy SSA \a alignment tags.
    • Added proper alignment priority: \an / \a overrides take precedence over style alignment.
    • Improved rendering of simultaneously displayed subtitles with different positions and alignments.
    • Preserved compatibility with existing SRT subtitles and non-positioned ASS subtitles.

    Source code released under MIT License

    Download file

  • Version 2.2.6

    Released Jul 24, 2026 - 35.33 KB
    Works with firefox 142.0 and later, android 142.0 and later
    Font issue for mobile has been fixed.

    Source code released under MIT License

    Download file

  • Version 2.2.5

    Released Jul 24, 2026 - 35.13 KB
    Works with firefox 142.0 and later, android 142.0 and later
    bug fix

    Source code released under MIT License

    Download file

  • Version 2.2.4

    Released Jul 24, 2026 - 35.12 KB
    Works with firefox 142.0 and later, android 142.0 and later

    Source code released under MIT License

    Download file

  • Version 2.2.3

    Released Jul 24, 2026 - 35.39 KB
    Works with firefox 142.0 and later, android 142.0 and later

    Source code released under MIT License

    Download file

  • Version 2.2.2

    Released Jul 24, 2026 - 35.39 KB
    Works with firefox 142.0 and later, android 142.0 and later

    Source code released under MIT License

    Download file

  • Version 2.2.1

    Released Jul 24, 2026 - 35.48 KB
    Works with firefox 142.0 and later, android 142.0 and later
    bug fix

    Source code released under MIT License

    Download file

  • Version 2.2.0

    Released Jul 24, 2026 - 35.17 KB
    Works with firefox 142.0 and later, android 142.0 and later
    • Status Notifications: Added helpful feedback notifications so you are always informed about your actions (e.g., a "Subtitle added" alert).
    • Toggle to Top: Added a new "Toggle to Top" feature, implemented directly from your user review requests!
    • Rich Text Subtitles: HTML tags (such as bold and italic) are now fully supported and rendered within subtitles.
    • Dual-Language Additions: Added exciting new features to the dual-subtitle mode.
    • Refined UI: The extension interface has been redesigned to be much more compact, clean, and user-friendly.
    • Dual-Language Polish: General optimizations and structural improvements for a smoother dual-language experience.
    • Display Consistency: Fixed an issue where subtitles looked different or scaled incorrectly when switching between windowed and fullscreen modes.
    • Dual-Language Fixes: Resolved various bugs related to the dual-language functionality.

    Source code released under MIT License

    Download file

  • Version 2.1.1

    Released Jun 20, 2026 - 33.68 KB
    Works with firefox 142.0 and later, android 142.0 and later
    mobile fix

    Source code released under MIT License

    Download file

  • Version 2.1.0

    Released Jun 20, 2026 - 33.67 KB
    Works with firefox 142.0 and later, android 142.0 and later
    🎬 ASS Subtitle Player v2.1.0

    🌟 New Features
    * YouTube & Popular Sites: Full support for YouTube, Netflix, and Crunchyroll.
    * OpenSubtitles: Built-in search to find and load subtitles instantly without an account.
    * Dual Subtitles: Play two subtitle languages simultaneously (perfect for learning).
    * UI Revamp: New modern tabbed menu with English & Turkish language support.
    * Drag & Drop: Drop .srt or .ass files directly onto the video player.
    * Custom Position: Freely drag the subtitle box anywhere on the screen.

    ⚙️ Improvements & Fixes
    * Smart Sync: Experimental auto-sync, frame shifting, and permanent FPS conversion.
    * Site Profiles: Save distinct visual styles specifically for different websites.
    * Shorts/TikTok Mode: New "Vertical" aspect ratio added.
    * Auto-Restore: Automatically remembers and reloads your last used subtitles.
    * Shortcuts: Added new Alt hotkeys for quick delay adjustments and toggles.
    * Fullscreen Fix: Reliable fullscreen support for custom web players (like JW Player).

    Source code released under MIT License

    Download file

  • Version 1.6

    Released Apr 30, 2026 - 16.07 KB
    Works with firefox 142.0 and later, android 142.0 and later

    Source code released under MIT License

    Download file