Country Tiers & GEO Lists

Browser extension for building tiered country lists and GEO allow/block segments.
For ad targeting, TDS rules, Cloudflare WAF, nginx, and traffic management.

Releases · 301.st

---

Features

• 249 countries with flags, regions, and tier classification (T1/T2/T3)
• 8 region filters (EUR, CIS, NA, LATAM, APAC, MENA, AFR, OCE) + meta-groups (EU, EEA, G7, G20, BRICS, Five Eyes)
• 10 export templates: 301.st TDS, CSV, JSON, JS array, Cloudflare WAF, nginx map, and more
• Allow/Block mode with bulk operations (select all, invert, clear)
• Import from any text (auto-detects country codes and names)
• Preset system with favorites
• Dark/Light/System theme
• Zero tracking, zero network requests
• Works offline — all data bundled

Install

Store	Link
Chrome Web Store	Install
Firefox Add-ons	Coming soon
Edge Add-ons	Coming soon

Build from source

npm install
npm run build          # Chrome MV3
npm run build:firefox  # Firefox MV2
npm run build:edge     # Edge MV3
npm run zip:all        # All 3 ZIPs

Development

npm run dev            # Chrome dev
npm run dev:firefox    # Firefox dev
npm run check          # typecheck + lint + tests

License

MIT

Sponsor

Built for 301.st Smart Traffic