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Browser descriptor

Referenced In

Fields

FieldTypeDescriptionDefault
browserstringRequired. Browser engine to open. The session opens on the context’s automation server with a blank page and registers as a surface; use a goTo step (with surface) to navigate it. No cross-engine fallback — the one exception is edge, which is Chromium and opens on the same Chrome/chromedriver stack (it registers under the chrome engine, and defaults its surface name to chrome when you don’t set one).

Accepted values: chrome, firefox, safari, webkit, edge
—
namestringOptional. Surface-registry name later steps use in surface. Default: the engine name. Must be unique across all open surfaces — the context’s default browser already owns its engine name, so name a second same-engine session explicitly. An engine keyword may only name a session of that engine.

Minimum length: 1. Pattern: \S
—
headlessbooleanOptional. Run this session headless. Default: the context’s browser headless setting.—
sizeobject(Browser window size)Optional. Outer window dimensions for this session. Default: the context’s browser window size.—
viewportobject(Browser viewport size)Optional. Viewport (page-content) dimensions for this session; the window is resized so the content area matches. Takes precedence over size when both are set.—
driverOptionsobjectOptional. Escape-hatch passthrough: merged into the session’s capabilities after the ones Doc Detective computes. Driver- and version-specific; use sparingly.—

Examples

{
"browser": "chrome",
"name": "example",
"headless": true,
"size": {
"width": 42,
"height": 42
},
"viewport": {
"width": 42,
"height": 42
},
"driverOptions": {}
}