Steve Dudenhoeffer 6647e4f63d fix: set default viewport for NewBrowser and align User-Agent with engine ...

NewBrowser previously had no viewport (strong headless signal) and used a
Firefox User-Agent unconditionally, even for Chromium instances (detectable
mismatch).

Add per-engine UA constants (DefaultFirefoxUserAgent, DefaultChromiumUserAgent)
and auto-select the matching UA in initBrowser when the caller hasn't set one
explicitly. Keep DefaultUserAgent as a backward-compatible alias.

Add 1920x1080 default viewport to NewBrowser (most common desktop resolution).
NewInteractiveBrowser keeps its existing 1280x720 default but also gains
engine-aware UA selection.

Closes #70

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-24 01:28:09 +00:00

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