Custom browser extensions built around the way you work
If your team repeats the same task in the browser every day, an extension can do it for them. We design it with Manifest V3 for what your company needs, just for your team or published on the Chrome Web Store, and keep it working when the browser changes.
What an extension is and when it pays off
A browser extension is a small program that adds features to Chrome, Edge or Firefox: a button, a context menu, a keyboard shortcut or changes to a specific website.
It pays off when a task is repeated often, always happens in the browser and no existing extension solves it without asking for more access than it should. Many of the most useful ones are internal: they do something specific to your company and are never published. If a good extension already exists, we'll tell you.
What an extension can do
Internal tools for your company
Extensions just for your team, built around your processes and systems, installed in your browsers without going through the public store.
Automate repeated tasks
Fill in forms, copy data between sites or trigger an action with a keyboard shortcut.
Add features to a site you don't control
A button in your provider's panel, your CRM or a server console, as we did with KVM Console Paste.
Capture and export
Save audio, text or data from a tab in the format you need, like Tab Audio Recorder.
Connect the browser to your systems
Send what's on screen to your WordPress, WooCommerce or custom software through its API, with permissions.
AI where you work
Summarise, classify or translate on the open page, using your company's key, without pasting data into an outside chat.
Our extensions
We built them because we had the problem ourselves. Since anyone can use them, we published them for free on the Chrome Web Store.
Tab Audio Recorder
Records the audio of a Chrome tab to WebM or MP3, entirely on your device. 28 users on the Chrome Web Store (November 2026).
KVM Console Paste
Pastes text into web KVM consoles (noVNC) by simulating keystrokes. 811 users and a 5.0 rating on the Chrome Web Store (November 2026).
Coming soon
Extensions we use every day and are getting ready to publish.
AI translator for WPML
Translates the pending fields in WPML's translation editor with the AI model you choose: Gemini, Claude, OpenAI, Mistral or any compatible one.
CleanTabs AI
Closes the tabs you no longer need using the browser's built-in AI. It learns which domains and topics matter to you, and in learning mode it shows you what it will close before it does.
See the extensionHow we work
01. You describe the task
What you do today, on which sites and how often. If a reliable extension already solves it, we recommend it.
02. Fixed proposal
What it will do, which permissions it needs and why, which browsers, public or private. With a written price.
03. Prototype
A first version you try in your browser on your real sites, before we polish it.
04. Installation or publishing
If it is internal, we install it in your team’s browsers. If it is published, we prepare the listing, screenshots and privacy policy, and submit it for review.
Manifest V3 and browsers
- Manifest V3 is the current Chrome extension format; Chrome no longer accepts new Manifest V2 extensions. Everything we build starts on V3.
- Chrome, Edge, Brave and other Chromium browsers share almost all the code.
- Firefox also supports Manifest V3, with differences in background code and some permissions. If it has to work in both, we decide it at the start, not at the end.
Privacy by design
- Only the permissions it needs, each one explained: on the store listing if it is published, or in its documentation if it is internal.
- Local processing wherever possible. Our published extensions send nothing to any server and use no analytics.
- If a server is needed (for AI or your API), it is clear what data leaves the browser, where it goes and who sees it.
- A privacy policy for each published extension, as the stores require.
Installation, publishing and maintenance
If it is internal, we install it in your team’s browsers and leave you the steps to add it on a new computer. If it is published, we handle the developer account (yours or ours, depending on whether the extension should belong to your company), the listing, screenshots, privacy disclosures and review replies.
Extensions break for two reasons: the browser changes its rules, as with Manifest V2, or the target site changes its layout. When that happens, we review it and fix it.
Who does the work
We are a small studio with 8 years of hands-on WordPress experience, working freelance since February 2018. We are based in A Coruña, Spain. You talk to the person who does the work, not to a go-between. We meet by video call and, if you are in Barcelona, in person too. We have published our own extensions on the Chrome Web Store and maintain them ourselves. Who does the work
Frequently asked questions
How much does a custom extension cost?
It depends on what it does, how many browsers it must support and whether it needs a server. You get a fixed written quote after we look into the task.
Will I own it?
Yes. The code is yours and, if it is published, it can go under your company's developer account.
Can it be private, for my team only?
Yes, and it is the most common choice for an internal tool. It is installed directly in your team’s browsers, without going through the store, or published as unlisted so only people with the link can find it.
Can it work in Chrome and Firefox?
Usually yes, with adjustments for each. We agree on it at the start.
What if Chrome changes something and it breaks?
We review it and fix it so it works with the new version.
Can you update an extension I already have?
Yes, if you have the source code, including migrating from Manifest V2 to V3.
Got a task you keep repeating in the browser?
Tell us what you do, on which sites and how often. We tell you whether an extension solves it and give you a fixed written quote.
Your first consultation is free. We look at what you tell us and reply within 48 business hours.