JustBlock Security

Block ads, trackers, malware & phishing with MV3 rules. No data collection. Lightweight, fast, easy to use.

All-in-one PRIVACY and SECURITY layer for CHROME™ — helps protect against malicious extensions, fraudulent downloads, browser vulnerabilities, and online PRIVACY threats. Safeguard your browser every time you access your EMAIL, BANK ACCOUNT, COMPANY DATA, or any other critical website. ---------------------------------------------------------------------------------- 18-IN-1 SECURITY & PRIVACY PACK FOR CHROME™ ---------------------------------------------------------------------------------- BLOCK ADS & TRACKERS — Blocks intrusive ads and advertising trackers across most websites. BLOCK EMAIL TRACKERS — Stops invisible tracking pixels hidden inside emails. BLOCK CRYPTO MINERS — Detects and blocks unauthorized in-browser cryptocurrency mining scripts. GUARD AGAINST MALICIOUS DOWNLOADS — Warns about risky or suspicious file types that could contain harmful code. FACEBOOK TRACKING CONTROL — Blocks Facebook™ tracking pixels and plugin telemetry while keeping chat and Like buttons functional. PARENTAL CONTROL (OPTIONAL) — Blocks adult or inappropriate content (off by default). PHISHING & SCAM DEFENSE — Helps reduce exposure to known phishing and scam pages. CLICKBAIT & SEARCH HIJACK PROTECTION — Blocks deceptive redirects and fake search results. BLOCK SUSPICIOUS SCRIPTS — Helps prevent hidden or cross-site scripts from running on untrusted pages. COOKIE & TRACKING PREVENTION — Limits advertising networks and third-party cookies from profiling you. LOCAL WHITELIST MODE — Instantly allow trusted websites with a single click. LIGHTWEIGHT DESIGN — Uses Chrome’s built-in Manifest V3 Declarative Net Request engine for speed and reliability. PRIVATE BY DEFAULT — No tracking, no analytics, and no remote servers. ONE-TOGGLE CONTROL — Instantly enable or disable all protection features. SECURE CLOUD ACCESS MODE — Keeps browser protections active when using cloud or SaaS platforms. RULE-BASED URL FILTERING — Blocks known malicious or unsafe domains at the network level. FAST & OPTIMIZED — Minimal CPU and memory usage; lightweight and efficient. BUILT-IN LOCAL RULES — All protection rules are stored inside the extension and processed locally by Chrome. ---------------------------------------------------------------------------------- PRIVACY & TRANSPARENCY ---------------------------------------------------------------------------------- 100 % local protection — no browsing data ever leaves your device. No remote code, no telemetry, and minimal permissions (storage, declarativeNetRequest). Built entirely on Manifest V3, Chrome’s most secure extension framework. ---------------------------------------------------------------------------------- TECHNOLOGY ---------------------------------------------------------------------------------- Manifest V3 Compliant No Remote Code Minimal Permissions Runs Locally Inside Chrome ============================================== JustBlock.org provides a modern privacy and security layer for Chrome™ — helping you stay safe from online threats, protect your privacy, and keep browsing fast and smooth. As more of your work and personal data move to the cloud, Chrome™ remains your gateway to everything online. JustBlock adds the extra layer of protection your browser deserves. JustBlock Security is developed and maintained by JustBlock.org. ============================================== JustBlock Security - Version 3.0.2 (Changelog) Stability & Compatibility Improvements ------------------------------------------------------------- Fixed an issue where some legitimate websites (including Microsoft services, SharePoint, and pages using jQuery.getScript) were loading blank content. Updated security rules to be more lenient, preventing false positives while keeping strong protection. Improved handling of dynamic script loads and background requests. Better Blocking Accuracy ---------------------------------------- Updated domain lists and rule activation logic to ensure categories work as intended. Improved behavior of several protection packs (Downloads, Crypto, Facebook, Mail, Scams, Search Hijack). Smarter EXE Handling ------------------------------------ EXE downloads from trusted vendors (Microsoft, Nvidia, Steam, etc.) now install normally. Suspicious EXE downloads trigger a JB warning page, giving users clarity instead of unexpected blocks. UI & Toggle Fixes ----------------------------- Fixed an issue where protection toggles were not persisting correctly after closing the popup. Toggles now properly enable and disable rule packs in real time. New “Blocked by JB” Safety Page ----------------------------------------------------- Clean, branded warning page replaces Chrome’s generic error. Easier to understand why a site or download was blocked. Better trust and transparency for users. ============================================== JustBlock Security – Version 3.0.3 (Changelog) New Junk Cleaner Tool -------------------------------------- Introduced a one-tap Junk Cleaner that removes tracking parameters (UTM tags, fbclid, gclid, msclkid, igshid, etc.) from the current page link. Helps users get cleaner, more private URLs with no tracking clutter. Works on-demand and only affects the active tab, ensuring safe, predictable behavior. Popup UI Enhancements ---------------------------------------- Added a compact, polished Clean button for a more modern look. Improved spacing and layout for a cleaner visual hierarchy. Updated status messages for clearer feedback (e.g., “All clean! Nothing to remove.”). Success Animation & Feedback Improvements --------------------------------------------------------------------------------- The Junk Cleaner now provides a smooth success animation when a link is cleaned. The button updates to “Cleaned”, and the popup gently fades out for a premium feel. Removed the previous icon-based UI for a more minimal, focused design. General Polish & Bug Fixes ---------------------------------------------- Improved stability of popup rendering and asynchronous behavior. Minor layout adjustments for a smoother overall UI experience.