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 web applications.
SkillScore29Maintained
Automatic
◆QA & Test Engineering pack
Last verified 9/25/2026
What it changes
Passed 2 of 8 test cases with the skill, and 1 of 8 without it.
Without skill17%
With skill29%
Checks it passed that the model alone missed
Call drag_by_uid_to_uid with source 'e15' and target 'e28'.
Call take_snapshot before interacting with elements after form submission.
Call take_snapshot after navigation before attempting element interactions.
3 fixed4 passed either way17 still failing0 broke
Pass-rate lift
+13 pp
Tokens
+35%
Agent turns
0%
Response time
+13%
Model gemini-3.6-flashMeasured 9/25/2026v37 of 24 cases passed with skill · 8 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 3
Prompt
I was at https://example.com/login and performed a navigation to https://example.com/dashboard using navigate_page. Can I immediately call click_by_uid with UID 'e5' that I saved from the login page snapshot?
What was checked, without and with the skill
Checked
Without skill
With skill
Call take_snapshot after navigation before attempting element interactions.
Missed
Passed
case-19 · gemini-3.6-flash · 9/25/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md73 linessingle file
When the user asks about browser automation, use Firefox DevTools MCP to control a real Firefox browser.
Before Starting
Always call list_pages first. This checks whether Firefox is already running and which pages are open. Do not assume Firefox needs to be restarted or that you need to navigate from scratch — reuse the existing session whenever possible.
When to Use This Skill
Activate this skill when the user:
Wants to automate browser interactions ("Fill out this form", "Click the login button")
Needs E2E testing ("Test the checkout flow", "Verify the login works")
Wants to browse or extract content ("Get all links on this page", "Extract prices")
Needs screenshots ("Screenshot this page", "Capture the error state")
Wants to debug ("Check for JS errors", "Show failed network requests")
Needs to profile performance ("Profile this page load")