SubFlex - Subtitle Controller version history - 2 versions
SubFlex - Subtitle Controller by Extension Flex
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 KBWorks with firefox 109.0 and laterSubFlex 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
Older versions
Version 1.0.0
Released Sep 8, 2026 - 185.84 KBWorks with firefox 109.0 and laterSource code released under MIT License