Performs an accessibility code review of a local diff or Phabricator revision in the style of the Firefox accessibility team. Use this skill whenever the user asks to review a Phabricator patch or revision for accessibility issues, mentions a D-number (like D284142) in the context of accessibility review, asks "does this patch have any a11y issues", or wants to check a diff against accessibility guidelines. Also use it when the user says things like "can you review this for a11y", "check this patch", or "give me an accessibility review of D[number]". Invoke proactively when the user pastes a phabricator.services.mozilla.com URL or shares a revision ID alongside any accessibility concern. Invoke when questions about the following topics are raised: aria properties, aria roles, high contrast mode, forced colors, prefers contrast, focus order, screen readers, assistive technology.
6.4k5mo agoReviewMountCreate a free account to mount
File a Bugzilla bug for Firefox/Gecko work, or draft a bug summary and description. Use when the user asks to file a bug, wants a bug summary/description for a change, or needs to report a defect/enhancement/task. Determines the product and component with `mach file-info`, drafts the summary and description, and opens a prefilled enter_bug.cgi form in the browser for the user to submit.
Steady3 mentions in 2 weeks
3 projects use a version of this
6.4k5mo agoReviewMountCreate a free account to mount
Use this skill when the user wants to file good-first-bugs in Bugzilla for Firefox. A good-first-bug is a narrow, self-contained, low-risk task scoped so a first-time contributor can land it without deep context. Sources include lint warnings, small typos, dead-code removal, mechanical refactors, docs conversions, or any other small task the user points at. Produces prefilled `enter_bug.cgi` URLs the user clicks to submit. Trigger on phrases like "file a good first bug", "open good first bugs for X", "create a good-first-bug from this".
3 projects use a version of this
6.4k5mo agoReviewMountCreate a free account to mount
Structured performance opportunity investigation for SpiderMonkey (the Firefox JavaScript engine). Use this skill when the user wants to investigate JS engine performance, profile SpiderMonkey, find optimization opportunities, write performance patches, or evaluate benchmark regressions. Trigger on mentions of: profiling JS, SpiderMonkey performance, JIT optimization, benchmark regression analysis, shell benchmarking, or any request to make JS workloads faster.
3 projects use a version of this
6.4k5mo agoReviewMountCreate a free account to mount
You MUST use this skill when working with Firefox's linting infrastructure (mozlint), adding new linters, modifying existing linters, running linters, or dealing with linting issues.
3 projects use a version of this
6.4k5mo agoReviewMountCreate a free account to mount
Analyze Firefox performance profiles using the profiler-cli CLI tool. Trigger when given a profiler.firefox.com or share.firefox.dev link, a local profile path, or when the user wants to investigate an issue in a Firefox profile. Always use this skill instead of WebFetch for Firefox profiler URLs; WebFetch only retrieves the profiler UI's HTML shell and cannot access profile data, whereas profiler-cli downloads and parses the actual profile into a local daemon that supports structured queries over stacks, markers, threads, and samples.
3 projects use a version of this
6.4k5mo agoReviewMountCreate a free account to mount
Analyze a range of local commits, and reorganize them to minimize latency and friction in the review and landing process. To achieve this, commits can be split, reordered, squashed / grouped, or even rewritten. In the final commit series / "patch stack", the codebase should build, lint, and test cleanly after every commit, and each individual commit should stand on its own.
Steady3 mentions in 2 weeks
1 project uses a version of this
6.4k5mo agoReviewMountCreate a free account to mount
Map relationships between a web spec section, its Firefox implementation code, and Web Platform Tests. Use when starting work on a spec feature, checking implementation coverage, or finding which WPTs to enable.
3 projects use a version of this
6.4k5mo agoReviewMountCreate a free account to mount
File a Bugzilla bug for Firefox/Gecko work, or draft a bug summary and description. Use when the user asks to file a bug, wants a bug summary/description for a change, or needs to report a defect/enhancement/task. Determines the product and component with `mach file-info`, drafts the summary and description, and opens a prefilled enter_bug.cgi form in the browser for the user to submit.
38340d agoReviewMountCreate a free account to mount
Use this skill when the user wants to file good-first-bugs in Bugzilla for Firefox. A good-first-bug is a narrow, self-contained, low-risk task scoped so a first-time contributor can land it without deep context. Sources include lint warnings, small typos, dead-code removal, mechanical refactors, docs conversions, or any other small task the user points at. Opens a prefilled `enter_bug.cgi` form per bug in the user's browser for them to submit. Trigger on phrases like "file a good first bug", "open good first bugs for X", "create a good-first-bug from this".
38340d agoReviewMountCreate a free account to mount
Find the right reviewer for a Firefox/Gecko change so the user does not have to. Use this primarily when committing changes, to fill in the `r=` part of the commit message automatically instead of leaving it blank or guessing. Also use it when the user asks directly who should review a patch or what reviewer group to use.
38340d agoReviewMountCreate a free account to mount
A folder with a SKILL.md file: a name, a description of when to use it, and instructions. Claude loads a skill only when the task matches its description.
How do I use one I find here?
Copy the folder into your project's .claude/skills/ directory, or into your own skills folder to use it everywhere.
What do the warnings mean?
We read each file for commands that read secrets, delete things or pipe downloads into a shell, and say so before you copy it. No warning is not a promise that a file is safe.
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BrowserWorksSkill