We architect and deploy custom smart contracts for tokens, DeFi protocols, and NFT ecosystems. Our team specializes in Solidity 0.8+ and Rust, implementing battle-tested patterns from OpenZeppelin and Solana Program Library.
LABS
Services
Browser Extension Wallet Connector
Secure, custom browser extension wallet development and integration SDKs. We build robust wallet connectors with enterprise-grade permission management and content script security for your Web3 application.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
- Security-First Development: Every contract undergoes internal audits and formal verification before deployment to mainnet.
- Gas Optimization: We write efficient code to minimize transaction fees, often achieving 20-40% gas savings.
- Full Lifecycle Support: From initial design and testing to deployment, verification, and ongoing maintenance.
Deliver a secure, auditable foundation for your product in as little as 2-4 weeks.
key-features-cards
BUILT FOR PRODUCTION
Core Technical Capabilities
Our wallet connector development delivers enterprise-grade security, seamless user experience, and deep multi-chain integration to accelerate your Web3 product launch.
02
Custom Transaction & Signing Flows
Build complex, gas-optimized transaction sequences with custom UI/UX for approvals, batch transactions, and cross-chain swaps. We handle edge cases like fee estimation, nonce management, and RPC fallbacks for 99.9% reliability.
99.9%
Transaction Success Rate
< 100ms
Signing Latency
03
Real-Time State & Event Management
Robust listeners for network changes, account switches, and balance updates. We implement reactive state synchronization using Ethers.js or Viem, preventing common UX pitfalls like stale data or disconnected states.
05
Modular Architecture & SDK
Receive a clean, documented SDK with TypeScript definitions, allowing your team to easily extend functionality. Architecture supports custom providers, middleware for logging/analytics, and isolated test environments.
06
Cross-Platform Browser Support
Fully tested compatibility across Chrome, Firefox, Safari, and Brave, including mobile browsers. We handle browser-specific APIs and polyfills, ensuring consistent behavior and onboarding for all users.
4+
Major Browsers
100%
ESM/CJS Support
benefits
TANGIBLE RESULTS
Business Outcomes for Your Team
Our Browser Extension Wallet Connector development delivers measurable improvements to your product's security, user experience, and development velocity. Here’s what you can expect.
01
Accelerated Time-to-Market
Deploy a production-ready, multi-chain wallet connector in under 2 weeks. We provide a fully integrated solution with popular frameworks like React, Vue, and Next.js, eliminating months of R&D.
< 2 weeks
Deployment Time
100%
Framework Coverage
02
Enterprise-Grade Security
Security-first architecture with certified audits. We implement best practices from OWASP and OpenZeppelin, ensuring secure key management, transaction signing, and phishing protection for your users.
Certified
Security Audits
0
Critical Vulnerabilities
03
Seamless Multi-Chain Support
Go live with support for Ethereum, Polygon, Arbitrum, and Base on day one. Our modular architecture allows easy integration of new EVM and non-EVM chains (Solana, Cosmos) as your product scales.
10+
Chains Supported
1 day
New Chain Integration
04
Enhanced User Experience & Retention
Reduce user drop-off by 40% with intuitive onboarding, one-click connections, and real-time network switching. We optimize for the lowest possible friction from install to first transaction.
40%
Lower Drop-off
< 3 clicks
To First TX
05
Reduced Development Overhead
Eliminate the maintenance burden of wallet SDKs, provider updates, and chain integrations. We handle all compatibility updates, bug fixes, and protocol changes with a 99.9% uptime SLA.
99.9%
Uptime SLA
24/7
Support & Updates
Strategic Decision Analysis
Build vs. Buy: Custom Connector vs. Basic Integration
A detailed comparison of the total cost of ownership, risk, and time-to-market between developing a secure browser extension wallet connector in-house versus partnering with Chainscore Labs.
| Key Factor | Build In-House | Chainscore Custom Connector |
|---|---|---|
Time to Market | 6-12 months | 4-8 weeks |
Initial Development Cost | $150K - $400K+ | $25K - $75K |
Security Audit & Pen Testing | Additional $30K - $100K | Included |
Ongoing Maintenance (Annual) | 1-2 FTE Engineers ($150K - $300K) | Optional SLA from $20K/year |
Multi-Chain Support (e.g., EVM, Solana, Cosmos) | Per-chain implementation required | Pre-built, modular architecture |
Compliance & Standards (EIP-6963, WC2) | Your team's responsibility | Built to latest specifications |
Uptime & Performance SLA | Your infrastructure, your risk | 99.9% Uptime Guarantee |
Total Cost of Ownership (Year 1) | $330K - $800K+ | $45K - $95K |
how-we-deliver
PROVEN METHODOLOGY
Our Development & Security Process
We deliver secure, production-ready wallet connectors through a rigorous, multi-stage process designed for enterprise-grade reliability and rapid deployment.
01
Architecture & Protocol Design
We architect your extension using secure, modular patterns (like MV3) and implement robust EIP-1193/EIP-6963 standards for seamless multi-wallet compatibility and future-proofing.
EIP-1193/6963
Standards Compliant
MV3
Architecture
02
Secure Core Development
Our team builds the core wallet logic—key management, transaction signing, and RPC communication—with zero-trust principles, isolated contexts, and comprehensive input validation.
Zero-Trust
Security Model
Isolated Contexts
Core Principle
03
Comprehensive Security Audit
Every line of code undergoes internal review followed by a formal audit. We focus on critical vectors: phishing resistance, key storage integrity, and transaction simulation to prevent malicious injections.
Formal Audit
Mandatory Step
Phishing & Injection
Key Vectors
04
Staging & Multi-Chain Testing
We deploy to a staging environment for rigorous testing across EVM chains (Ethereum, Polygon, Arbitrum) and non-EVM networks, ensuring flawless interaction with your dApp's smart contracts.
EVM & Non-EVM
Chain Coverage
Staging Env
Deployment Phase
05
Store Deployment & Compliance
We manage the complete submission process to Chrome Web Store and Firefox Add-ons, ensuring your extension meets all platform policies for security, privacy, and content.
Chrome & Firefox
Store Support
Policy Compliance
Guaranteed
06
Monitoring & Incident Response
Post-launch, we provide real-time monitoring for anomalous activity and maintain a 24/7 incident response protocol to address any critical security or functionality issues immediately.
24/7
Response SLA
Real-Time
Monitoring
security
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts to power your protocol.
We architect and deploy audit-ready smart contracts on EVM and Solana. Our development process is built for security and speed, delivering a minimum viable product (MVP) in 2-3 weeks.
- Custom Logic:
ERC-20,ERC-721,ERC-1155, DeFi primitives, DAO governance, and bespoke protocol logic. - Security-First: Built with
OpenZeppelinstandards, comprehensive unit testing, and pre-audit review. - Full Lifecycle: From architecture and development to deployment, verification, and post-launch monitoring.
We ensure your core business logic is immutable, secure, and performs as intended—eliminating costly exploits and deployment delays.
Browser Extension Wallet Connector
Frequently Asked Questions
Get answers to common questions about our custom wallet connector development service for Web3 applications.
A standard, production-ready browser extension wallet connector with core features (multi-chain support, transaction signing, key management) typically takes 3-5 weeks from kickoff to deployment. Complex integrations (e.g., MPC wallets, custom signing flows, hardware wallet support) can extend this to 6-8 weeks. We provide a detailed project plan within the first week.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall