Browser extension
A Chrome, Edge or Firefox extension built on Manifest V3 and published to the stores.
GradaxEuropean companyOrder outright
Founded 2014·Built and operated in Europe·1 to 7 weeks
About this service
Extensions put a tool exactly where people work: inside the browser, on the pages they already use. We build extensions for internal teams or public release, using Manifest V3, with the minimum permissions needed so users trust it and store reviewers approve it.
Minimum permissions, maximum trust
When a user installs an extension, the browser shows the permissions it requests. An extension asking to read and change data on all websites raises suspicion, and many users decline. Store reviewers also look harder at broad permissions.
We request only what the extension actually needs, for only the sites it works on. That improves installation rates, speeds up review and reduces risk if anything goes wrong.
Built for Manifest V3
Chrome has moved to Manifest V3, a new extension standard with different rules for background scripts, network requests and remote code. Older Manifest V2 extensions are being phased out across Chromium browsers.
We build new extensions on Manifest V3 and migrate older ones where needed. Some features, such as how network requests are modified, work differently under V3 and require redesign rather than a simple port.
For internal tools, extensions can be deployed privately to your organisation without a public store listing. Public extensions get store listings with clear privacy disclosures.
- Manifest V3 architecture
- Permissions limited to what is needed
- Private deployment or public store listing
- Privacy disclosures for store review
What you get
Everything below is in the price. Nothing here is an upgrade.
- Specification of features and permissions
- Extension source code
- Popup, options page and content scripts as needed
- Store listing and privacy disclosures
- Submission or private deployment
What changes
- An extension that works in Chrome and Edge, and Firefox where needed
- Permissions limited to what the extension actually uses
- Published to the Chrome Web Store, or deployed privately to your team
- Updates handled through the stores automatically
How it runs
Specify
Features and the smallest set of permissions that supports them.
Build
Manifest V3 extension with content scripts and a service worker.
Test
Run on target sites, browsers and edge cases.
Publish
Listing, privacy details and submission prepared.
Compare the sizes
The standard price for each size. Extras are priced beside it, not hidden behind a call.
| Included | Simple extension€2901 to 2 weeks | Published extension€5003 to 4 weeks | Connected extension€1,0505 to 7 weeks |
|---|---|---|---|
| One main feature | Included | Included | Included |
| Chrome and Edge | Included | Included | Included |
| Popup interface | Included | Included | Included |
| Private install | Included | Included | Included |
| Options page and saved settings | Not included | Included | Included |
| Content scripts on target sites | Not included | Included | Included |
| Chrome Web Store listing and submission | Not included | Included | Included |
| User login and sync with your API | Not included | Not included | Included |
| Firefox version | Not included | Not included | Included |
| Usage analytics with consent | Not included | Not included | Included |
| Order | Select | Select | Select |
Add what you need
Choose the size
Add what you need
Your total€500
ContinueThe standard price, plus whatever you add. Confirmed in writing before anything starts; nothing is charged until you accept it.
Questions
What is Manifest V3?
The current standard for Chrome extensions. Older Manifest V2 extensions are being phased out, so new extensions must use V3.
Can you update our old extension?
Yes, including migration from Manifest V2. Some features work differently in V3, and we assess them first.
How long does store review take?
Often a few days, longer for broad permissions. Asking for fewer permissions speeds it up.
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Order it
Standardised enough to order on its own. The price is confirmed in writing before anything starts.