mozilla

Generates a daily FxA triage summary. Queries Jira, GitHub, Bugzilla, and optionally Sentry, then outputs a Slack-ready update with detailed analysis. Use when starting triage duties or preparing the daily triage post.

Drafts a Jira bug report for an FXA issue. Gathers repro steps, expected vs actual behaviour, and affected surface, outputs a structured report, and optionally files the ticket via the Atlassian MCP. Returns the new FXA-N key when filed.

Drafts a concise Jira description for an FXA task. Gathers context via targeted interview, researches relevant patterns in the repo, outputs a clean description, and optionally files the ticket via the Atlassian MCP. Returns the new FXA-N key when filed.

Drafts an FXA pull request title and body following the repo PR template and team conventions, then opens the PR as a draft after explicit confirmation. Use when a feature branch is ready and the user wants to open a PR. Do not invoke for edits to an existing…

Generates a two-audience changelog from merged PRs in the FxA monorepo: a plain-language product summary and an engineer handoff with operational notes. Name a train (e.g. "341") or pass any git range; with no argument it defaults to the in-development train…

Simplifies and refines code in the FXA monorepo using project-specific conventions. Use when asked to simplify, clean up, or refine recently written code. Focuses on recently modified code unless instructed otherwise.

Reviews changed React/TSX code for component design, hooks misuse, performance, accessibility, and state management issues. Reports findings with severity and concrete fix recommendations. Operates on files changed vs main.

Fast single-pass FXA-specific commit review covering security, conventions, logic/bugs, tests, and migrations. No subagents — runs directly in the main context.

Use this skill to audit tables for missing column descriptions and classify each missing column into the correct base schema promotion target (global.yaml, app_<product>.yaml, or <dataset_name>.yaml). Accepts a dataset name and an optional table filter — omit…

Use this skill when looking up, auditing, or managing column descriptions from global, application-specific, and dataset-specific column definition YAML files (bigquery_etl/schema/global.yaml, bigquery_etl/schema/app_<name>.yaml, and…

Use this skill when the prompt asks to create, open, or submit a pull request in the bigquery-etl repository. Handles branch creation, staging, committing, pushing, and opening a draft PR with a structured description. Triggered by phrases like "create a PR",…

Use this skill when looking up field descriptions for Mozilla Glean telemetry tables (tables ending in _live or _stable, e.g. <app>_stable.<ping>_v1). Fetches descriptions from the Glean Dictionary (dictionary.telemetry.mozilla.org) using WebFetch with…

Use this skill when creating or updating DAG configurations (dags.yaml), schema.yaml, and metadata.yaml files for BigQuery tables. Handles creating new DAGs when needed and coordinates test updates when queries are modified (invokes sql-test-generator as…

Use this skill to enrich schema.yaml files for BigQuery tables in the bigquery-etl repository. Handles creating schema.yaml when it doesn't exist, finding and filling missing column descriptions (from base schemas, upstream source schema, query context, or…

Use this skill to create or update README.md files for BigQuery ETL tables in the mozilla bigquery-etl repository. Follows layout conventions derived from comparing README files across the repo — rich style with emoji headings, Mermaid data flow diagram,…

ALWAYS use this skill when users ask to "create a skill", "make a skill for...", "add a new skill", or similar requests. This skill guides the creation of effective skills in the bigquery-etl repository that extend Claude's capabilities with specialized…

Reference for constructing revision-pinned source, spec, and bug permalinks (Searchfox, GitHub, GitLab, googlesource, Codeberg, Chromium, FFmpeg, Bugzilla, specs). Use when citing code, specs, or bugs in analysis or reports and you need stable,…

File a Bugzilla bug directly via the BMO REST API with full power the prefilled enter_bug.cgi form can't do — create the bug AND upload one or more attachments (logs, patches, testcases, screenshots) AND set bug-/attachment-level flags (needinfo?, review?,…

Help prepare a Firefox security approval request by analyzing local commits/changes, deciding whether sec-approval is required at all (only parent-process vulnerabilities triggerable from a content process), and drafting answers to the sec-approval…

Help prepare a Firefox uplift approval request (Beta, Release, and/or ESR) by checking whether patches are already on the bug, auditing sanitization once for sec-* bugs, and drafting the approval comment per…

Firefox bug triage assistant for media, web conferencing, and graphics related issues.

Generate technical documentation for a specified technology domain with optional customization.

Generate or modify Firefox mozconfig build configuration files. Use when the user asks to create a mozconfig, configure a build, set up ASan/TSan/debug builds, or match try server configurations.

Firefox bug triage assistant for determining if a bug severity rating of S1 or S2 is warranted, and to gather information for triaging and prioritization.

This skill should be used when the user asks about browser automation, testing web pages, extracting content, filling forms, taking screenshots, or monitoring console/network activity. Activates for E2E testing, form automation, browsing tasks, or debugging…

Show console errors and failed network requests

Navigate Firefox to a URL and take a DOM snapshot for interaction

Take a screenshot of a URL or the current page

Find and fix why a website is slow by capturing and analyzing a Firefox performance profile, or by analyzing a profile the user already has (a saved file or a profiler.firefox.com share link). Use for slow page loads, janky scrolling or animation, slow…

Diagnose Firefox DevTools MCP setup issues. Activate when the firefox-devtools-mcp plugin fails to connect, its tools are not available, or the user reports Firefox DevTools not working in Cowork.

Run the end-to-end loop for landing a legacy Fenix UI test converted onto the ui/efficiency framework: convert → file a Bugzilla bug → commit with the real bug number → track in Jira (conversion vs. enablement) → open a moz-phab review. Use this when a…

Author or convert Fenix Android UI tests onto the ui/efficiency framework. Use this whenever the task involves writing a new efficiency UI test, converting/porting a legacy ui/ (robot-based) test onto the efficiency framework, or building what a test needs —…

Review and authoring guidance for new/changed tests in the Fenix TAE efficiency framework (mobile/android/fenix/app/src/androidTest/java/org/mozilla/fenix/ui/efficiency). Use when reviewing a diff, PR, or Phabricator revision that adds or modifies files under…

End-to-end New Tab train-hop targeting for the Experimenter repo. From a single trainhop version string, files the GitHub targeting issue, branches, adds the NimbusTargetingConfig entry, lints, and stages a drafted commit. Use for "newtab trainhop targeting"…

Durable review guidance for Firefox's built-in IP Protection (VPN) module, covering panel UI, proxy/channel filtering, authentication, telemetry, and localization.

Use after tests pass on a Nova feature — before linting or formatting — to annotate changed files with @nova-cleanup instructions for post-launch automated cleanup.

Drafts and reviews the non-code parts of an addons.mozilla.org (AMO) submission for a Firefox extension -- the listing name/summary/description (checked against Mozilla's "No Surprises" and Content policy clauses), and the "Notes for Reviewers" text (testing…

Helps a Firefox extension developer classify what data their add-on collects/transmits into Mozilla's data_collection_permissions taxonomy (personallyIdentifyingInfo, healthInfo, financialAndPaymentInfo, authenticationInfo, personalCommunications,…

Scaffolds a new manifest.json for a Firefox WebExtension, or lints an existing one for technical/schema problems (wrong shape for Manifest V2 vs V3, missing browser_specific_settings.gecko.id, invalid content_security_policy or web_accessible_resources shape,…

Scans a Firefox WebExtension/add-on codebase for likely violations of Mozilla's Add-on Policies — permissions scope, remote code loading, CSP relaxation, data collection & consent (manifest data_collection_permissions), monetization rules (ads, affiliate…

Scan what landed on firefox-main over a window (a day, a week, or a whole Nightly cycle) and surface the changes worth asking a developer about for a release note — with bug numbers, whether the change is gated and how, feature rollups across many bugs, and a…

Review draft Firefox release notes for style, tone, scoping, and audience-fit against the Mozilla Release Management Release Notes Style Guide. Use when the user wants release notes checked/edited before publishing — they may paste the notes, point to an…

Triage the recent community-filed Firefox bug queue and recent regressionwindow-wanted bugs. Pulls both lists, classifies each bug (duplicate, needs-info, regression, feature request, invalid, valid-new), attempts to find regressors where findable, and…

Runs a read-only SQL query against the Customer Experience tables (moz-fx-data-shared-prod.customer_experience_derived) and returns results as a formatted table. Use when the question requires counts, aggregations, rankings, or distributions — not when it…

Runs VECTOR_SEARCH against the Customer Experience retrieval indexes (moz-fx-data-shared-prod.customer_experience_derived) and returns the top-K most semantically similar documents. Use after the embed skill has produced an embedding file.

Receives a text question and returns its embedding vector using gemini-embedding-001 via Vertex AI. Use this when you need a semantic embedding for a question — for downstream vector search, similarity comparison, or passing to another tool.

Run Base Load Engineer checks for the current day and produce a prioritized action list

Run pre-commit checks, review PR checklist, and draft a commit message for Relay changes

Cut a new stmo-cli release: curate the changelog, bump the version, open the release PR, tag it, let CI publish the GitHub Release with binaries, then publish to crates.io by hand. Use when the user asks to release, cut a release, ship a new version, or…

Sync the vendored stmo Claude skill (.claude/skills/stmo/SKILL.md) with a stmo-cli change and prepare delivery to the mozilla-firefox/firefox repo via moz-phab. Use after a stmo-cli change (new command, flag, or workflow behavior) that the firefox-facing…

Audit and update dependencies across Python, npm, and pre-commit ecosystems

Invoke this skill whenever the user is contributing to the mozcloud Helm chart or its library charts — whether asking how to do something OR actually doing it. This includes: generating a new Helm template or helper file, modifying an existing template or…