Software Engineer, Firefox Desktop Integrations

Canada
Remote
Posted Oct 15, 2026
1 position

$74,000–$110,000 / year

Opens LinkedIn

Employment type: Full-time
Experience level: Entry, Junior · 0+ years
Posting language: English
Working hours: 40 hours per week
Seniority: Entry level

Job summary

Help develop and maintain Firefox installation, update, and operating-system integration features, with a focus on Windows and macOS. Collaborate with teammates on scoped engineering tasks, participate in code reviews, and identify and fix bugs that improve the browser experience.

Job details

Help us improve your Mozilla experience In addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy. Cookie settings Products Firefox browsers Mozilla VPN Mozilla Monitor Firefox Relay MDN Plus Thunderbird 0DIN Tabstack Otari All products About us Our Mission About Mozilla The Mozilla Manifesto Get Involved Blog Our Work Mozilla Foundation Mozilla.ai Mozilla Ventures Mozilla Advertising Mozilla Builders Mozilla New Products Mozilla Careers Menu Overview Diversity and Inclusion Benefits Teams Locations Job Listings Software Engineer, Firefox Desktop Integrations at Mozilla Corporation Team: Firefox Locations: Remote Canada Remote Canada 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. About This Team The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well! The Desktop integrations team is a cross-functional team that focuses on updates, installs and integrating Firefox with different OS platforms. As part of the Desktop Integrations team, you will be responsible for all things related to OS integration (particularly Windows and macOS) and helping us grow our user base. Our team is geographically distributed, and working in the open is the norm. We contribute to the code driving the Firefox browser on all desktop platforms. About The Role A Software Engineer is an early-career individual contributor who is growing in their ability to take on more complex tasks. At Mozilla, this role involves working on engineering projects that typically span several weeks and require collaboration with peers. Software Engineers at this level contribute to implementation, ask thoughtful questions, and raise blockers early. They communicate clearly within their team, follow team processes, and steadily build expertise in their domain. What You’ll Do Assist in the development and maintenance of Firefox features related to installs, updates, and OS integrations. Work on improvements to the Firefox installation and update process with guidance from senior engineers. Support efforts to solve platform-specific challenges on Windows and/or macOS, particularly where Firefox must interact directly with the operating system. Collaborate with your manager and teammates to define and scope tasks, with regular check-ins to share progress and ask for support when needed. Participate in code reviews to grow your understanding and contribute to a high-quality codebase. Help identify and fix bugs that improve the Firefox experience for our global user base. Engage with a distributed team and contribute positively to our open and inclusive work environment. What You’ll Bring Some experience with systems-level programming on a major platform (e.g., Windows, macOS). Proficiency with C/C++ programming. Willingness to communicate clearly, ask questions, and seek feedback. Ability to contribute to collaborative projects and steadily build up your technical and problem-solving skills. A growth mindset and enthusiasm for contributing to impactful software. Bonus Points Exposure to or experience with Rust. Familiarity with Linux, or macOS internals. Exposure to or familiarity with native Windows or macOS APIs (such as Win32 or Cocoa) Previous participation in open source projects or a strong interest in learning how to contribute. We value a variety of voices within our team and at Mozilla. You don't need to check every box on this list to apply. What You’ll Get Generous performance-based bonus plans to all regular 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 orientations, 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 hiringaccommodation@mozilla.com 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. Group: E Req ID: R3253 Hiring Ranges Canada Tier 1 Locations $82,000—$110,000 CAD Canada Tier 2 Locations $74,000—$99,000 CAD Remote Canada Applicant Privacy Notice Why Mozilla? At Mozilla, we’re serving humanity—by maintaining a safe, open internet—while also helping the individual humans employed here to reach their personal and professional goals. With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla. Our values drive our actions Purpose is built into our work, with our mission driving every decision We challenge assumptions, the status quo, ourselves, and each other We are transparent: in our code, our business partnerships, and our everyday interactions We seek out people from diverse backgrounds and with perspectives different from our own We pair purpose with performance and put people ahead of profit Our impact is global 1000+ paid staff from over 30 countries Thousands of volunteer contributors across six continents 2 global offices: Berlin and Toronto 9 coworking space locations: San Francisco, San Mateo, London, Paris, Portland, Tulsa, Vancouver, Chicago, and Bellevue Hundreds of home offices globally Our benefits are world-class Flexible work environment (majority of Mozillians work remotely) Industry-leading paid parental leave (up to 26 weeks of fully paid leave for childbearing parents and up to 12 weeks for non-childbearing parents) Reimbursement for professional development (up to $3,000/year) A work setup including the latest hardware and software of your choice Company Leadership Press Center Careers Merch Store Contact Support Product Help File a Bug Localize Mozilla Security Developers Developer Edition Enterprise Tools MDN Firefox Release Notes Follow @Mozilla Bluesky (@mozilla.org) Instagram (@mozilla) LinkedIn (@mozilla) TikTok (@mozilla) Spotify (@mozilla) Follow @Firefox Bluesky (@firefox.com) Instagram (@firefox) YouTube (@firefoxchannel) TikTok (@firefox) Donate All languages Language English (Canadian) English (British) English Donate to the not-for-profit Mozilla Foundation. 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What you’ll do

Requirements

Candidates should have some systems-level programming experience on a major platform and proficiency in C/C++. They should communicate clearly, seek feedback, collaborate effectively, and be motivated to grow their technical and problem-solving skills; Rust, Linux or macOS internals, native platform APIs, and open-source experience are bonuses.