Implement and ship approved UX improvements for Firefox screen, window, and tab sharing. Build accessible, tested, and localizable browser UI in a large codebase; collaborate with UX and QA, support testing with web conferencing services, and contribute through public code review. The role requires production front-end experience with JavaScript, HTML, and CSS, automated UI testing, rapid onboarding to mature codebases, and effective asynchronous communication.
About the team and role
Mozilla's Web Conferencing team owns the media capture and sharing features that make Firefox work for video calls: screen, window, and tab capture, and the interface users interact with when they share content in Google Meet, Zoom, or Jitsi.
We're bringing a set of screensharing improvements to Firefox. The backend work is complete and the UX has been designed and approved. We're looking for a front-end engineer on a fixed-term contract to implement it and ship it.
What you'll do
- Implement approved UX designs for Firefox's screen, window, and tab sharing experience, and see them through to release
- Build browser UI that holds up in a large, widely used codebase: tested, accessible, and localizable
- Work with UX on the cases a design didn't anticipate, and with QA on validating the result
- Support partner testing against major web conferencing services
- Land your work in mozilla-central through public code review on Phabricator
What you'll bring
- 4+ years building production user interfaces with JavaScript, HTML, and CSS
- Experience implementing an approved design faithfully, plus the judgment to flag it when the design meets a case it didn't anticipate
- Ability to get productive quickly in a large, mature codebase you didn't write
- Experience writing automated tests for user interfaces
- Strong asynchronous written communication, since the team is distributed across timezones
- Comfort working in public, since Bugzilla and Phabricator are open
Bonus qualifications
- Prior contributions to Firefox or another open-source browser
- Familiarity with Firefox front-end architecture: browser/, custom elements, XUL, Fluent localization
- Experience with WebRTC or getDisplayMedia
- Accessibility experience with modal dialogs and list navigation
- Experience with Mozilla's test frameworks (browser-chrome, mochitest)
- Experience using AI tooling effectively in front-end development
- Open source environment experience
Hiring Ranges:
Canada Tier 1 Locations
$145,000—$170,800 CAD
Canada Tier 2 Locations
$154,000—$168,000 USD
Similar Jobs
Artificial Intelligence • Productivity • Software • Automation
Develop enterprise customers’ automation strategies, identify and deploy high-value AI-enabled use cases, quantify ROI, and drive adoption, renewal, and expansion. Build executive and stakeholder relationships, advise on governance and scalable orchestration, coordinate internal and customer teams, interpret usage data, and create repeatable methodologies and playbooks for Zapier’s enterprise customer success program.
Top Skills:
AIAutomationData ScienceRevopsSlackZapier
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
Manages strategic relationships with cybersecurity services retainer customers, helping them improve preparedness and optimize service investments. Responsibilities include customer success planning, account reviews, service scoping, coordination with Sales and Delivery, documentation, account expansion, and program improvement. The role requires cybersecurity services knowledge, incident response awareness, strong project coordination, senior-level relationship management, communication, workload management, and the ability to use AI technologies to improve business outcomes.
Top Skills:
Ai TechnologiesCrowdstrikeCybersecurityIncident ResponseSecurity Frameworks
Gaming
Own global business operations workflows, including the Global Fonts Program and Player Data Compliance initiatives. Coordinate studios and corporate teams across Legal, Privacy, Procurement, Publishing, and Engineering. Maintain compliance records, contracts, approvals, and risk-tracking systems; manage vendor proposal workflows; optimize operational processes using tools such as Airtable, Jira, Confluence, and generative AI. Provide project management support for software migrations, tool rollouts, and M&A integration initiatives.
Top Skills:
AirtableConfluenceGeminiGenerative AiGoogle WorkspaceJIRA
What you need to know about the Singapore Tech Scene
The digital revolution has driven a constant demand for tech professionals across industries like software development, data analytics and cybersecurity. In Singapore, one of the largest cities in Southeast Asia, the demand for tech talent is so high that the government continues to invest millions into programs designed to develop a talent pipeline directly from universities while also scaling efforts in pre-employment training and mid-career upskilling to expand and elevate its workforce.
