Phantom Specter v5.4.1

🧿 Phantom+Specter v5.4 (Adblocker)

An ultra-lightweight, privacy-focused hybrid content filtering engine designed to reduce unwanted advertising, trackers, and suspicious embedded content while maintaining exceptional performance and low runtime overhead.

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⚡ Features

🧩 Ultra-lean Core

• Runs at document-start for maximum early-page protection.
• Singleton guard prevents duplicate execution across reinjections.
• Designed for minimal CPU, memory, and layout impact.
• Avoids heavy polling loops and unnecessary recalculations.

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🚫 Site Exclusion System

Allows full opt-out per domain for compatibility and control.

• Stores excluded sites locally via GM_getValue
• Instantly bypasses all filtering logic on excluded domains
• Lightweight lookup with no runtime scanning overhead

Menu Options

• 🚫 Exclude this site
• 🔄 Clear exclusions

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🛡 Network Request Blocking

Intercepts and blocks unwanted requests at the browser level using:

• fetch() interception
• XMLHttpRequest interception
• Dynamic src assignment filtering (images, scripts, iframes)

Targets include:

• Advertising networks
• Analytics services
• Tracking & fingerprinting providers
• Sponsored content delivery platforms

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👻 Hybrid Intelligence Engine

A two-tier adaptive filtering system:

⚡ Fast Path

• Immediately removes known ad scripts, images, and iframe sources
• Executes only on DOM additions (no continuous scanning)
• Minimal CPU overhead per mutation batch

🧠 Deep Intelligence Mode

• Activates only under increased DOM activity
• Performs broader inspection of newly injected nodes
• Detects suspicious iframe patterns dynamically
• Avoids full DOM traversal unless necessary

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🎯 CSS-Based Filtering Layer

Instant visual suppression of common advertising elements:

• Sponsored content blocks
• Banner and promotional containers
• Ad iframes and embeds
• Known ad-related IDs and class patterns

Applied instantly at document-start for zero delay.

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🧠 Smart Mutation Monitoring

A lightweight MutationObserver system designed for efficiency:

• Observes only DOM additions
• Applies fast-path filtering immediately
• Uses adaptive “budgeting” to prevent CPU spikes
• Escalates to deeper scanning only when needed

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🎥 Minimal Video Observer

Uses IntersectionObserver to improve media efficiency:

• Activates videos only when in viewport
• Reduces background decoding and playback overhead
• Improves GPU/CPU efficiency on media-heavy pages

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🔐 Privacy

This script operates with strict privacy guarantees:

• ❌ No data collection
• ❌ No external server communication
• ❌ No analytics or telemetry
• ❌ No user tracking
• ❌ No account requirements

All processing happens locally in the browser.

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⚙️ Performance Philosophy

Phantom+Specter is designed around three principles:

🧭 Lightweight. Intelligent. Invisible.

Instead of aggressively rewriting pages, it:

• Targets only known unwanted patterns
• Avoids unnecessary DOM traversal
• Minimizes observer workload
• Prefers selective intervention over blanket modification

The goal is silent, efficient improvement without destabilizing modern web applications.

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📜 License

Released under the MIT License.

You are free to:

• Use it personally or commercially
• Modify and extend it
• Redistribute or fork it

Provided “as-is”, without warranty of any kind.