@mozilla/screenshot
BTake a screenshot of a URL or the current page. Use when the user asks to capture, screenshot, or photograph a web page or URL.
Install
agr install @mozilla/screenshot --target claudeWrites 1 file into .claude/skills/, pinned to git-6b078930.
- .claude/skills/screenshot/SKILL.md
Document
name: screenshot description: Take a screenshot of a URL or the current page. Use when the user asks to capture, screenshot, or photograph a web page or URL. argument-hint: [url or uid]
/firefox-devtools-mcp:screenshot
Captures a screenshot of a URL or the current page and shows it to the user.
Usage
/firefox-devtools-mcp:screenshot https://example.com # Navigate then screenshot
/firefox-devtools-mcp:screenshot # Screenshot current page
/firefox-devtools-mcp:screenshot <uid> # Screenshot specific element
Steps
- Navigate if a URL was given: call
navigate_page. - Take the screenshot using the method that matches your environment:
In Cowork (system prompt contains an outputs folder host path under "Shell access"):
- Call
screenshot_page saveTo="<host-outputs-path>/screenshot.png"using the host path from the system prompt, not the container path. - Load and call
present_fileswith that same path so the user receives a clickable file card.
In Claude.ai chat or Claude Desktop (no outputs folder in system prompt):
- Call
screenshot_pagewithoutsaveTo. - Your final response must include the actual image returned — not a description of it. The user cannot see tool call outputs, only what you include in your reply.
Trustgrade B
- passBody integrity
Whether the stored document is plausibly the kind of file the artifact declares, rather than something fetched by mistake.
- passType matchnot applicable to this artifact type
Whether the artifact is really the kind of thing its metadata claims it is.
- passFreshness
How long since the source repository was last pushed to.
- passPrompt injection
Scans the artifact's own text for instructions aimed at your agent rather than at you.
- warnLicenseno SPDX license detected
Whether the source repository declares an SPDX license permissive enough to redistribute.
How the grade is calculated
Each check contributes 0 points when it passes, 1 when it warns, and 2 when it fails. The total maps to a letter:
- Aevery check passed
- Bone warning
- Ctwo warnings
- Dprompt injection or body integrity failed, or three warnings
- Fone of those failed, and something else is wrong
These are automated hygiene checks, not a security audit, and not a dependency or vulnerability scan. A grade of A means nothing was flagged — not that the artifact is safe.
Versions
git-6b07893014922026-07-31