Verify that browser profiles are actually isolated from one another instead of assuming it - confirm each profile's timezone agrees with its own exit IP, that WebRTC exposes only the proxy, that canvas and WebGL hashes stay identical across relaunches of one profile, and that no two profiles share a persona, a cookie jar, or an address.
Install
npx skills add antibrow/anti-detect-browser-skills --skill multi-account-isolationnpx skills add antibrow/anti-detect-browser-skills --skill multi-account-isolation -a claude-code -gnpx skills add antibrow/anti-detect-browser-skills --skill multi-account-isolation -a codex -ggemini skills install https://github.com/antibrow/anti-detect-browser-skills.git --path multi-account-isolationgh skill install antibrow/anti-detect-browser-skills multi-account-isolationgit clone --depth 1 https://github.com/antibrow/anti-detect-browser-skills /tmp/antibrow__anti-detect-browser-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/antibrow__anti-detect-browser-skills/multi-account-isolation ~/.claude/skills/multi-account-isolation # Claude Code
cp -R /tmp/antibrow__anti-detect-browser-skills/multi-account-isolation ~/.agents/skills/multi-account-isolation # Codex, Cursor, Gemini CLI, Copilot, OpenCode