Build Powerful & Privacy-Friendly Firefox Extensions
At Tantrija, we develop custom Firefox extensions using the latest WebExtension APIs. Whether it’s automation, scraping, wallet integrations, or productivity tools — we create secure, lightweight, and scalable browser add-ons tailored to your exact needs.
Our Firefox Extension Development Services
We develop Firefox extensions for automation, productivity, Web3 wallets, data scraping, form filling, and custom enterprise use cases — with full support for cross-browser deployment and Mozilla store publishing.
Custom Firefox Extension Development
We design and build tailor-made Firefox add-ons for businesses, startups, and SaaS platforms. Whether it’s background scripts, content scripts, or browser actions — your extension will be fully customized and production-ready.
Cross-Browser WebExtension Porting
Already have a Chrome extension? We help port it seamlessly to Firefox using the WebExtension API — ensuring full compatibility, UI consistency, and feature parity across browsers.
Web3 & Wallet Extension Integration
We build crypto and blockchain-based Firefox extensions with MetaMask, WalletConnect, custom token logic, and smart contract interactions — all with secure transaction signing and onboarding.
Form Automation & Autofill Extensions
Save time with extensions that auto-fill forms, handle repetitive data entry, capture page info, and integrate with CRMs or Google Sheets. Perfect for recruiters, sales teams, and operations-heavy workflows.
Data Scraping & Content Extraction
Extract structured data from websites using lightweight Firefox scraping extensions with built-in rate limiting, CSV export, background scheduling, and secure storage.
Productivity Tools & Popup Dashboards
Develop Firefox add-ons that include popups, dashboards, sticky note overlays, calendar reminders, screen capture tools, or session managers — fully synced and UX-optimized.
Publishing & Mozilla Add-On Store Compliance
We handle packaging, permissions, privacy policies, and content security policy (CSP) audits to ensure smooth publishing on the Firefox Add-On Store (AMO).
Enterprise & SaaS Extension Solutions
Need a custom internal tool or B2B extension? We build Firefox add-ons that integrate with APIs, internal dashboards, or third-party platforms with advanced permission control and versioning support.
Architecture Overview
The real technology layers behind a Firefox Extension Development engagement.
Core
JavaScript
The SDK or extension's core logic, built for the target runtime.
Distribution
npm
Versioned packaging for developer adoption.
Supporting Services
Node.js
Any backend API the SDK/extension talks to.
Documentation
Next.js
Developer-facing docs sites, where the engagement includes one.
Benefits
Cross-Platform Ready
Works on Firefox, Chrome, Edge
We build WebExtensions using standard APIs for multi-browser compatibility and future scalability.
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Every other real, in-production service we offer alongside this one.
/ FAQs
Frequently Asked Questions
Can you port our existing Chrome extension to Firefox?
Yes. We port using the WebExtension API, ensuring full compatibility, UI consistency, and feature parity across browsers rather than a partial rebuild.
Do you build Web3/crypto wallet extensions for Firefox?
Yes, including MetaMask and WalletConnect integration, custom token logic, and smart contract interactions, with secure transaction signing and onboarding.
What kinds of business extensions do you build beyond Web3?
Form automation and autofill tools, data scraping and content extraction extensions, productivity dashboards, and internal/B2B tools that integrate with your APIs or internal systems.
Do you handle publishing to the Firefox Add-On Store?
Yes. We handle packaging, permissions, privacy policies, and content security policy (CSP) audits so your extension clears Mozilla's review process smoothly.
Can the same extension also work on Chrome and Edge?
Yes - we build with cross-browser compatibility in mind from the start, so a Firefox extension can realistically extend to Chrome and Edge without a separate codebase.
Let’s Build Your Extension — the Right Way