Senior Staff Product Manager, Browser Control Platform

Mozilla; Greater London; On-site; GBP 111,000 - 148,000; Full time

Benefits offered by this job

Generous performance-based bonus plans

Medical, dental, and vision coverage

Generous retirement contributions with

100% immediate vesting

Job summary

Mozilla is seeking a product-minded engineer to own the foundation layer that powers Firefox integrations and external tools. You will shape a broad, greenfield space with both strategic and hands-on execution, guiding internal teams and external AI tools through a single shared platform.

You’ll drive security, safety, and trust in the system, define how third-party AI assistants are used, and help Mozilla build browser-powered products for developers and users alike.

Qualifications

• A product-minded engineer or a very technical PM who can drive a technical product.
• Experience in developer-space thinking, with the range to balance consumers and internal platforms.
• Comfortable setting strategy in ambiguity; own a technical contract other teams depend on.
• Strong instincts on security and trust; nice to have: web standards, MCP, browser automation.

Responsibilities

• Own the shared foundation and the building blocks it gives other software, and make them reliable and secure.
• Push the open standard (WebDriver BiDi) forward, and build Firefox-only advantages the standard won’t cover
• Design the safety controls: let a person approve actions, see when software is acting for them, and take back control.
• Define the strategy for any major third‑party AI assistants people already use.
• Serve internal teams (Smart Window, New Products) and outside tools through one shared layer.

Skills

Product-minded engineer

Technical PM

Developer-space experience

Security and trust instincts

Tools

WebDriver BiDi

Browser automation

Job description

Why Mozilla?

Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people.

Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.

About this team and role:

This role owns the foundation that lets other software drive Firefox: the secure, reliable connection an outside tool or another team uses to act inside the browser, and the building blocks they call to do it. It enables the teams building on it — internal teams, outside AI tools — to create their own products on top. This role owns the shared layer and the strategy for it. It’s a hands‑on, technical role in a fast‑moving, greenfield space, so it’s as much strategy as execution.

The opportunity is broad: internal teams (Smart Window, New Products’ automated tools), outside AI tools and their users, and web developers. The three share much of the underlying technology, but each reaches its market in a different way. The mandate is to figure out what to go after, and in what order.

What you’ll do:

• Own the shared foundation and the building blocks it gives other software, and make them reliable and secure.
• Push the open standard (WebDriver BiDi) forward, and build Firefox-only advantages the standard won’t cover
• Design the safety controls: let a person approve actions, see when software is acting for them, and take back control.
• Define the strategy for any major third‑party AI assistants people already use.
• Serve internal teams (Smart Window, New Products) and outside tools through one shared layer.

Measured on:

Adoption across teams and tools, volume of usage through the platform, and sustained reliability and security.

What you'll bring:

• A product‑minded engineer, or a very technical PM who can drive a technical product
• Developer-space experience, with the range to think about consumers and internal platforms
• Comfortable setting strategy in ambiguity; own a technical contract other teams depend on
• Strong instincts on security and trust. Nice to have: web standards, MCP, browser automation

What you’ll get:

• Generous performance‑based bonus plans to all eligible employees - we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all‑company wellness days where everyone takes a pause together
• Country specific holidays plus a day off for your birthday
• One‑time home office stipend
• Annual professional development budget
• Quarterly well‑being stipend
• Considerable paid parental leave
• Employee referral bonus program
• Other benefits (life/AD&D, disability, EAP, etc. - varies by country)

About Mozilla

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Commitment to diversity, equity, inclusion, and belonging

Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity‑seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at [e-mail] to request accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Hiring Ranges:

Remote UK

£111,000 – £148,000 GBP