ffprofanity by lggcs

Profanity Filter automatically mutes your tab and displays censored subtitles when profanity is detected in video playback. Upload SRT, ASS, or WEBVTT subtitle files or let the extension auto-detect subtitles on supported sites including YouTube and Jellyfin. Profanity Filter automatically mutes your tab and displays censored subtitles when profanity is detected in video playback. A precise overlay renders subtitles at video frame rate with customizable font size, colors, opacity, and position. Adjust subtitle timing with an offset slider or keyboard shortcuts, preview upcoming cues, and toggle profanity-only mode to hide clean lines. All processing runs locally in your browser—no data leaves your machine.

Profanity is caught via exact match, regex obfuscation patterns, and fuzzy Levenshtein matching with configurable sensitivity. Censored words appear as [CENSORED] or are swapped for fun substitutions (Silly, Polite, Random, Monkey emoji, or your own custom mappings). A precise overlay renders subtitles at video frame rate with customizable font size, colors, opacity, and position. Adjust subtitle timing with an offset slider or keyboard shortcuts, preview upcoming cues, and toggle profanity-only mode to hide clean lines. All processing runs locally in your browser—no data leaves your machine.