Custom extension development
We build extensions from the ground up to fit your product, users, and business goals.
Browser extension specialists
We build browser
extensions that fit
your product.
From strategy through store launch and ongoing support, we help startups, SaaS companies, e-commerce brands, and enterprise teams build and improve browser extensions.
store.example.com/headphones
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Chrome
Safari
Firefox
Edge
CHROME EXTENSIONS✦EDGE EXTENSIONS✦FIREFOX ADD-ONS✦SAFARI EXTENSIONS✦MANIFEST V3✦WXT / PLASMO✦
Services
From first concept
From first concept
to launch and beyond.
Chrome, Edge, Firefox & Safari
We create a maintainable cross-browser architecture and handle browser-specific API differences.
Manifest V3 migration
We modernize legacy code, replace deprecated APIs, and migrate complex extensions safely to Manifest V3.
Backend & API integrations
We connect extensions to authentication, payments, AI services, CRM systems, affiliate platforms, analytics, and product APIs.
Store submission & publishing
We prepare production builds, listings, permission justifications, and review materials for each browser store.
Maintenance & support
We keep extensions compatible and reliable as browser APIs, operating systems, and store policies evolve.
Why TabForgeExtension expertise
Extension expertise
at every layer.
We bring product thinking, engineering, QA, and store-launch experience together, so the extension is treated as a core part of your product rather than a side project.
Extension-first engineering
We account for service workers, content scripts, messaging, permissions, and browser store policies from the start.
↗Extensions for diverse workflows
AI assistants, productivity tools, e-commerce, data capture, workflow automation, developer tools, and secure internal workflows.
↗Modern extension stack
We work with TypeScript, React, WXT or Plasmo, Manifest V3, service workers, secure messaging, and dependable build pipelines.
↗Designed for production
We plan for performance, browser differences, telemetry, permission scope, safe updates, and maintainability from day one.
↗Support after launch
After launch, we ship updates and new features, resolve store issues, fix bugs, and maintain cross-browser compatibility.
↗
Our team
A focused team for a specialized craft.
TabForge came together around a simple belief: browser extensions deserve the same product and engineering rigor as any core application. We combined product strategy, UX, engineering, QA, and store-launch expertise in one focused practice.
Today, our compact team works directly with startups and product organizations. The people shaping the architecture stay close through prototyping, launch, and long-term maintenance, so context is never lost between disconnected teams.
Use cases
Extensions for the way
Extensions for the way
your users work.
AI browser assistants
Page-aware summarizers, writing aids, and automated AI workflows that work inside the browser.
PAGE SUMMARY
Productivity tools
Turn repetitive browser work into fast, focused workflows.
Fewer stepsfor repetitive browser tasks
Data & page automation
Capture, transform, and act on page data with reliable content-script logic.
E-commerce & shopping
Coupons, cashback, price tracking, affiliate workflows, and in-page shopping tools.
Price dropped by 12%A saved item is now 12% cheaper →
Internal team tools
Secure browser workflows for sales, support, operations, and back-office teams.
Extension audits & upgrades
We audit and refactor existing extensions, migrate them to MV3, fix performance issues, and add features.
✓
Our processFrom idea
Discuss your project ↗
From idea
to production release.
01
Discovery & planning
We define the use case, target browsers, permissions, page contexts, integrations, and a practical scope for the first release.
02
UX design & prototyping
We design the popup, side panel, options pages, injected UI, and browser-specific interaction states before development begins.
03
Development & QA
Our developers build content scripts, background logic, APIs, storage, and analytics, backed by automated tests and quality checks.
04
Store launch
We prepare store-ready builds, listings, permission justifications, and privacy materials, then support the review process.
05
Maintenance & support
We maintain browser compatibility, resolve store issues, ship new features, and improve performance after launch.
FAQThe essentials,
The essentials,
answered.
A practical guide to timelines, browser support, migrations, and store submission.
How long does development take?＋
A focused MVP often takes 4–6 weeks. A more complex extension with authentication, backend integrations, or support for several browsers may take 8–14 weeks. We confirm timing after discovery.
Do you build for Chrome, Edge, Firefox, and Safari?＋
Yes. We use a shared codebase where practical and isolate browser-specific behavior, so each browser does not become a separate product.
Do you work with Manifest V3?＋
Yes. We build and migrate Manifest V3 extensions using service-worker backgrounds, compliant content security policies, carefully scoped permissions, and modern content-script patterns.
Can you migrate an existing extension?＋
Yes. We start with a technical audit, migrate high-risk components in stages, and plan releases to minimize disruption.
Do you help with store submission?＋
Yes. We prepare builds, descriptions, screenshots, and permission justifications, then support the review process through publication.
First step
Have an idea?
Have an idea?
Let's make it
part of the browser.
Tell us what you want to build, migrate, or improve. We’ll review the requirements and recommend a practical first release.
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Talk directly with extension specialistsYour first conversation is with people who understand extension architecture, APIs, and store requirements.