UltraBrowser: Privacy Browser

Undercover IT Firm

About this app

UltraBrowser is a privacy-focused Android web browser with a built-in developer and security testing toolkit. Designed for web developers, security researchers, QA testers, and privacy-conscious users who need full control over their mobile browsing experience.

🔒 PRIVACY & SECURITY

- Privacy Badger — blocks 140+ known tracker domains on every page load
- uBlock ad blocker — built-in filter lists, one-tap enable per site
- 19 fingerprint spoofing layers: canvas, WebGL, AudioContext, WebRTC, Battery, sensors, screen, timezone
- HTTPS-Everywhere automatic upgrade
- Encrypted local storage for bookmarks, notes, and cookie profiles
- No analytics, no telemetry, no ads
- Per-domain JavaScript blocking
- URL parameter stripping (utm, fbclid, gclid, and more)

🌐 BROWSING

- Multi-tab browsing with crash recovery — tabs survive app crashes
- Incognito tabs
- Reader mode with clean typography
- Full-page screenshots including horizontally-scrolled content
- Find in page
- View source (searchable)
- Dark theme throughout
- Bookmarks organized by folder
- Searchable browsing history
- Notes organized by domain

⬇️ DOWNLOADS

- Multi-threaded chunked downloads (1/2/4/8 parts, configurable)
- Pause/resume support, automatic retry
- Speed and ETA indicators
- Respects cookies, referer, and user agent (fixes 403 errors on auth-protected files)
- Data URIs and blob URLs supported

🛠️ DEVELOPER TOOLS

- Eruda full DevTools — element inspector, network monitor, console, storage viewer
- vConsole lightweight alternative
- 12 preset user agents, plus custom UA builder
- Cookie editor with full attribute support (Secure, HttpOnly, SameSite, Path, Expires)
- Save/restore cookie profiles across domains
- HTTP request history (Burp-style)
- Header analyzer with WHOIS (RDAP), DNS lookup, SSL certificate inspection
- Base64, URL, HTML, Hex, Unicode encoding/decoding
- MD5, SHA-1, SHA-256, SHA-512 hashing
- Source viewer

🔬 SECURITY TESTING TOOLKIT (HackBar)

UltraBrowser includes professional security testing tools for authorized penetration testing, security research, and educational purposes. These features are designed for web developers and security researchers testing their OWN applications or systems they have explicit written permission to test.

- Full HTTP method support: GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS
- Request repeater and match-and-replace
- JWT generator and decoder
- Hash identifier
- Common payload references: SQLi, XSS, SSTI, XXE, command injection, NoSQL, CRLF, open redirect
- Directory enumeration wordlists
- Parameter fuzzing with response diffing
- Admin panel path checking
- Google dorking query builder

⚠️ IMPORTANT: These security testing tools are provided exclusively for authorized testing on systems you own or have explicit permission to test. Using them against systems without authorization is illegal in most jurisdictions. UltraBrowser is not a tool for unauthorized access. You are responsible for complying with all applicable laws.

This app is intended for developers, security professionals, and privacy-aware users.

Keywords: browser, privacy browser, ad blocker, tracker blocker, devtools, cookie editor, user agent, javascript, webview, security testing, penetration testing, developer browser

What’s new

v1.6.0 — Stability & Privacy

- Fixed tabs/history/bookmarks resetting on every launch
- Fixed note & bookmark deletion bug
- Fixed incognito breaking normal tabs
- Privacy Badger learning mode now persists across restarts
- JS Console rewrite with close button
- Location spoofing toggle (off by default)
- Android 15 edge-to-edge support