Browser Extension Development Services
Browser Extensions That Put Your Software Where the Work Happens
A browser extension gets your software in front of users with no separate tool to deploy and no second login to manage. Writing the code is usually the smallest part of getting one into production. Permissions decide what a store approves and what a customer's security team allows, and most of the engineering sits in the systems behind the extension. Acropolium's browser extension development services cover Chrome, Firefox, Safari, and Edge, from scoping through store approval to the updates that come after it.
When Does Your Business Need a Custom Browser Extension?
The clearest case is work that happens inside software your company doesn't own and can't change. Often there is no API to work with, and where there is one, it rarely exposes everything that’s on the page. An extension runs inside that page, so your data and your checks land where the decisions are made.
For a company with its own product, a custom browser extension is also a distribution decision. Your users install it in two clicks, with no integration project on their side, as in the case with an API that requires extra engineering steps.
Scoping starts by testing the case against the alternatives. A feature that works on its own screen is usually cheaper as a web app, and we say so before quoting. When the work has to happen on a page you don't control, that’s when an extension earns its place.
Our Browser Extension Development Services
Building an extension is one job, while getting it through each store and keeping it working afterward are two more. We take on all three with the same team of engineers, so nothing waits on a second vendor and nothing gets subcontracted.
Custom Browser Extension Development
We build around the process you actually run, including the exceptions and the approval step nobody documented. Because this sits inside our custom software development work, the same engineers handle the extension and the systems it has to read from and write to.
Chrome Extension Development
Any Chrome browser extension development company now works under Manifest V3 only, which rules out remotely hosted code and the background pages older extensions were built on. Our Chrome extension development services build to it from the start, and the same codebase covers Edge with a separate Partner Center submission.
Firefox Extension Development
Firefox extension development services have to clear Mozilla's review and signing before an add-on will install. Most of a Chrome build carries over, though Firefox handles background scripts and network requests differently, so any Firefox extension development company has to rewrite and retest those parts.
Extension Publishing & Ongoing Support
Every update goes back through store review, and a new permission can move a routine release into a longer queue. We handle the submissions and the reviewer correspondence, so your release dates don't depend on someone in-house learning each store's rules.
Browser Extension UI/UX Design
An extension gets a popup a few hundred pixels wide and a content script sitting on top of someone else's stylesheet. Our frontend development team designs for both and treats the install prompt as part of the interface, since the permissions listed there decide how many people eventually finish the install.
Safari Extension Development
Safari extension development services carry more than the extension: a Safari web extension ships inside a macOS or iOS app, built in Xcode and submitted through App Store Connect under an Apple developer account. Budget it as an app release, because that is what Apple reviews, and as an experienced Safari extension development company, we scope and price it that way from the start.
Our Browser Extension Development Process
Two parts of an extension project sit outside your control: the store review queue and the pages your extension runs on. We plan around both from the start, and the browser list is agreed before any code is written, because every browser you add is another release track. Permissions get the same treatment, since a permission added after launch disables the extension for every user until they accept it.
1. Discovery & Requirements
We map the pages the extension will run on, the data it needs from your systems, and the permission set that covers both without asking for more. Our software consulting team leads it, so the questions that usually surface at submission are answered before the estimate.
2. UI/UX Design
Wireframes for the popup, the injected elements, and the install flow, all checked on the host pages where they will appear. A layout that collides with the page underneath gets caught here, when changing it costs nothing.
3. Development & API Integration
The extension shares your existing session instead of adding another login, and calls your systems through an API layer that handles rate limits, retries, and the offline case. Our web app development engineers build that layer alongside the extension.
4. Cross-Browser Testing
Every browser gets its own pass, because a shared codebase does not mean shared behavior. Our software testing and QA specialists cover each target browser, the version before it, and the host pages the extension reads.
5. Store Submission
We write the listing copy, the permission justifications, and the privacy disclosures each store requires, and then submit under your own developer accounts so you own the listing. Safari goes through App Store Connect, Firefox through Mozilla's signing, and Edge through Partner Center. For an internal tool, a policy install skips the stores altogether.
6. Ongoing Support & Updates
Browsers ship every few weeks, the pages your extension depends on get redesigned without notice, and store rules move. For instance, Chrome cleared the last Manifest V2 extensions out of its store in August 2026. We watch all three and fix what breaks, under a fixed monthly subscription.
Why Choose Acropolium as Your Browser Extension Development Company
An extension is a small build that turns into a long commitment, since browsers, stores, and the pages it runs on all change without asking you. Acropolium takes work at that size and still puts a solution architect on the estimate, so the scope you are quoted is the one an engineer stands behind.
23 years of custom software development
Browsers and stores change on their own schedule, and most of those years went on keeping other companies' software working through changes they did not control.
Five client relationships past 10 years, nine past 5
What decides whether an extension survives happens in year two, long after the build is signed off.
Delivered in-house, never subcontracted
An extension can read the pages your users are on, so the list of people with access to that code should be short and known.
ISO 9001:2015 certified since 2021, renewed in 2023
A store reviewer and a customer's security team ask the same question about how the code was built and who checked it, and the answer is on record.
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FAQ
- What is browser extension development, and how does it work?
What is browser extension development, and how does it work?
A browser extension is a small application that runs within a browser, with permission to read and change the pages the user is viewing and to reach your own systems. Development consists of the extension itself, the backend it interacts with, and the store policies that decide whether it ships. The third is what usually sets the release date, more so than the development itself.
- How long does it take to build a browser extension?
How long does it take to build a browser extension?
Discovery provides the range, driven by three factors: how much of the product sits behind the extension, the number of browsers you support, and whether it’s reliant on third-party pages. A simple one-browser extension with an uncomplicated backend is quick, and that is the standard brief to a Chrome extension development company. Review time is the part you cannot schedule, so we submit early.
- Which browsers can you build extensions for?
Which browsers can you build extensions for?
Chrome, Edge, Firefox, Safari, Opera, and Brave. The Chromium-based browsers run the same extension codebase, though the listings differ. Brave installs from the Chrome Web Store, but Edge and Opera have dedicated stores. A Safari browser extension development company also ships an app through App Store Connect, so Safari gets quoted separately. Extending the list of browsers costs a release cycle before it costs any code.
- How much does custom browser extension development cost?
How much does custom browser extension development cost?
The cost of custom browser extension development is determined after discovery. Price is influenced by the systems tied to the extension and the number of stores you submit to. If your extension relies on a web page you don't control, maintenance runs for its whole life and belongs in the budget. We build against an agreed scope, and maintenance is priced separately.