Journey design
Define activation, target pages, and user control.
Browser extension development
Tools built
directly into the browser
We develop extensions for Chrome, Firefox, and Edge — from focused helpers to advanced tools that analyze pages, automate actions, and connect to external services.
Start a projectApproach
Operating inside an environment you do not control
Extensions interact with third-party pages, security policies, permissions, multiple execution contexts, and store requirements. Resilience has to be designed from the beginning.
We separate UI, page interaction, background work, and storage, minimize permissions, and test against real websites to reduce failures and review friction.
Scope
Development through store readiness
Content scripts and DOM
Work with dynamic content, events, frames, and complex documents.
Manifest V3
Design service workers, messaging, permissions, and lifecycle.
Extension UI
Build popups, settings, side panels, and in-page controls.
Data and APIs
Provide storage, import, export, synchronization, and secure transfer.
Stores and releases
Prepare listing assets, privacy materials, packages, and updates.
Strengths
Experience beyond conventional frontend
Complex pages
Account for dynamic DOM, frames, shadow trees, delayed loading, and change.
Permission discipline
Request only justified access and keep it understandable.
Diagnostics
Design error states and feedback so issues can be reproduced.
Process
From browser workflow to store
Map
Identify sites, browsers, constraints, permissions, and critical workflows.
Prototype
Prove the highest-risk interactions before the full interface.
Develop
Build architecture, UI, page processing, storage, and tests.
Publish
Prepare materials and packages, navigate review, and ship updates.
Experience
Advanced browser tools built in-house
FormaCode builds extensions for changing website structures, user-defined rules, and technical page data.
Questions
Compatibility, permissions, and publishing
Can one extension support several browsers?+
Often yes. Chrome, Edge, and Firefox share much of WebExtensions, with API and store differences handled separately.
Can you help with Chrome Web Store review?+
Yes. We prepare the package and materials and help address feedback. The store makes the final decision.
Can extensions work on complex dynamic websites?+
Yes, subject to the site's structure and available execution context. High-risk interactions are prototyped first.