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SubFlex - Subtitle Controller version history - 2 versions

SubFlex - Subtitle Controller by Extension Flex

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SubFlex - Subtitle Controller version history - 2 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 1.1.0

    Released Sep 13, 2026 - 192.88 KB
    Works with firefox 109.0 and later
    SubFlex v1.1.0 — Performance, Compatibility & Styling Update

    This release brings major subtitle parsing reliability improvements, format support, and visual customization:

    • Multi-Encoding Auto-Detection: Automatically detects UTF-8, UTF-16, and Windows-1252/Latin-1 character encodings, fixing broken accented characters (é, à, ñ, ü) on non-English subtitles.
    • Advanced Subtitle Formats: Added full support for loading and rendering ASS and SSA (.ass, .ssa) subtitle files alongside SRT and VTT.
    • Subtitle De-Spammer Filter: Automatically removes injected promotional watermarks and website spam cues from downloaded subtitles.
    • Custom Subtitle Styling: Customize font size, colors (Pure White, Cinema Yellow, Cyan Glow), and background box modes (Translucent Glass, Solid, Text Outline) directly from the popup settings.
    • Fullscreen & Player Robustness: Improved overlay anchoring when toggling fullscreen video across YouTube and embedded web players.
    • Quick Keyboard Shortcuts: Added quick hotkeys for nudging offset ([ / ]), resetting sync (), and toggling subtitles visibility (V).
    • Bug fixes and memory optimization for long-duration video playback.

    Source code released under MIT License

    Download Firefox and get the extension
    Download file
  • Older versions

    Version 1.0.0

    Released Sep 8, 2026 - 185.84 KB
    Works with firefox 109.0 and later

    Source code released under MIT License

    Download file
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