Browser Extension Development
Chrome, Edge, and Firefox extensions that live where your users already work — their browser. Product companions, internal productivity tools, and standalone extension businesses, engineered to Manifest V3 standards and shipped to the stores.
The most underrated distribution channel in software.
An extension puts your product one click away all day long — in the exact context where your user needs it. That is why the best SaaS companies ship one: it collapses the distance between 'I need this' and 'I used it.' Grammarly, Honey, Loom — entire businesses live in the browser toolbar.
We build extensions that pass modern review standards the first time: Manifest V3 architecture, tight permissions (the number-one rejection and uninstall reason), content scripts that do not slow the pages they touch, and clean sync between the extension and your backend. Internal teams use us for scraping-assist, CRM-overlay, and workflow tools; product companies use us for companions that ride along with their web app.
Store-ready, not just working.
- Chrome extension built on Manifest V3 (Edge and Firefox builds included where wanted)
- Permission architecture designed for approval and user trust
- Content scripts, popup UI, side panel, and background workers as the product needs
- Secure auth + sync with your existing product or backend
- Chrome Web Store listing — copy, assets, privacy disclosures — submission handled
- Update pipeline so future versions ship in minutes
- Analytics on installs, activation, and feature usage
- Full source code — yours forever
From idea to the Web Store.
- 01
Scope call
What should the extension do, on which sites, for whom? We map the smallest permission set that delivers it — that is what gets approved and installed.
- 02
Proposal
Fixed quote, fixed scope, written timeline. Extensions are compact projects — most quotes land within 48 hours.
- 03
Build
Working builds you can side-load from week one. UI, content scripts, backend sync, edge cases across the sites you target.
- 04
Store review
We prepare the listing, privacy policy, and permission justifications, then drive the review process through to approval.
- 05
Iterate
Optional retainer: new features, new browser targets, and keeping ahead of Chrome platform changes.
Modern extension engineering.
Who ships extensions with us.
- SaaS products that want a companion extension living next to the user all day
- Teams with repetitive browser workflows an internal extension could collapse
- Founders building an extension-first product
- Companies whose old extension broke under Manifest V3 and needs a rebuild
Small surface, serious engineering.
Most extensions are focused builds: typical projects run $4–12k fixed-quote depending on surface area and backend needs. Store submission and first-approval support included.
Extension questions, answered.
How much does Chrome extension development cost?
A focused single-purpose extension typically runs $4–7k. Extensions with accounts, backend sync, and multi-site content scripts run $8–12k+. Fixed quote after a short scope call — never hourly.
What is Manifest V3 and why does it matter?
Manifest V3 is Chrome's current extension platform — old V2 extensions are being phased out and rejected. Everything we ship is MV3-native: service workers instead of background pages, declarative permissions, and modern security. If you have a legacy extension, we migrate it.
Can you get my extension approved in the Chrome Web Store?
That is part of the job. Approval hinges on permission minimalism, privacy disclosures, and clear listing copy — we design for review from day one and handle the submission and any back-and-forth until it is live.
Can an extension talk to my existing product?
Yes — secure login shared with your web app, data sync with your API, and UI that surfaces your product inside other websites. A companion extension is one of the highest-retention features a SaaS can ship.
Do you build for Firefox and Edge too?
Yes. We architect on WebExtensions standards so the same codebase ships to Chrome, Edge, and Firefox with minimal per-browser work.
Can you build internal-only extensions for my team?
Absolutely — private extensions distributed through enterprise policy or unlisted store entries. Common builds: CRM overlays, data-entry accelerators, QA tooling, and research/scraping assistants for your own workflows.
Ready to start?
Tell us what you're trying to build. Free 30-minute call. Written proposal with fixed pricing within 48 hours.