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Preview of Simple Profanity Blocker

Simple Profanity Blocker by deepanshu

Filters profanity and foul language from web pages in real-time. Privacy-first — all processing stays local.

Available on Firefox for Android™Available on Firefox for Android™
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About this extension
Simple Profanity Blocker is a modern, lightweight Firefox extension designed to clean up your web browsing experience. Whether you want to make browsing safer for children, avoid hostile online environments, or simply prefer a cleaner web, this extension gives you complete control over the text you see.
  • Four Filter Modes:
  • Blur (Default): Hides bad words with a premium glassmorphic blur. Simply hover your cursor over the word to temporarily reveal it.
  • Emoji: Replaces foul words with an angry censored emoji (🤬).
  • Replace: Replaces the letters with asterisks (****).
  • Remove: Completely deletes the offending words from the page.
  • Three Filtering Tiers: Choose your sensitivity level (Severe, Moderate, or Mild) to match your comfort level.
  • Advanced Evasion Protection: Smart matching catches common tricks used to bypass simple filters, including leetspeak (a*ck), repeated characters (auuuuck), zero-width space tricks, and non-alphabetic separators (a.u.c.k).
  • Whitelisting & False-Positive Guard: Uses an intelligent built-in dictionary to prevent innocent words from being accidentally blocked.
  • Custom Control: Add your own custom words to filter, or remove words you don't mind seeing.
  • Dynamic SPA Support: Automatically scans new content loaded dynamically via infinite scroll, React/Vue frameworks, or AJAX, keeping the page clean without requiring a refresh.
  • Per-Site Overrides: Easily toggle the blocker on or off for specific websites with a single click in the extension popup.


Simple Profanity Blocker is built with a strict privacy-first architecture.
* 100% Local: All word lists, normalizations, and content-filtering run locally on your device's CPU.
* No Data Collection: The extension does not collect, track, or transmit your browsing history, webpage text, or personal information.
* No Network Requests: No analytics tracking, no external API calls, and no remote telemetry.
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Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all web sites

Data collection:

  • The developer says this extension doesn't require data collection.
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Version
1.1.1
Size
55.93 kB
Last updated
a month ago (5 Jul 2026)
Related Categories
  • Privacy & Security
  • Appearance
  • Social & Communication
Licence
Mozilla Public Licence 2.0
Version History
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