Per the HTML spec, navigator.languages should return the user's
preferred languages. Most browsers return at least ["en-US", "en"]
to include the base language tag alongside the regional variant.
This matches Chrome, Firefox, and Safari behavior and improves
compatibility with sites that check for language negotiation.
- Handle failures during HTML, Markdown, and link serialization.
- Return MCP internal errors when result serialization fails.
- Refactor resource reading logic for better clarity and consistency.
Replace the hardcoded stub with a working implementation that stores
registered scripts and evaluates them in each new document.
Changes:
- Add ScriptOnNewDocument struct and storage list on BrowserContext
- Store scripts with unique identifiers when addScript is called
- Evaluate all registered scripts in pageNavigated, after the execution
context is created but before frameNavigated/loadEventFired events
are sent to the CDP client
- Add removeScriptToEvaluateOnNewDocument for cleanup
- Return unique identifiers per the CDP spec (was hardcoded to "1")
Scripts are evaluated with error suppression (warns on failure) to
avoid breaking navigation if a script has issues.
This unblocks CDP clients that rely on auto-injected scripts (polyfills,
monitoring, test helpers) persisting across navigations. Previously
clients had to manually re-inject after every Page.navigate.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Fixes issues reported by polyglot-scanner:
- Removed explicit `return` keywords and trailing semicolons to resolve DEAD_CODE/DEAD_BRANCH warnings.
- Replaced `epoch::advance().unwrap()` and `stats::resident::read().unwrap()` with safer alternatives (`drop` and `unwrap_or(0)`) to resolve ERROR_SWALLOW warnings.
- Replaced `let _ = Box::from_raw(...)` with `drop(Box::from_raw(...))` to correctly drop the box while fixing the ERROR_SWALLOW warning.
This fixes a bug in MCP where interactive elements were not assigned
a backendNodeId, preventing agents from clicking or filling them. Also
extracts link collection to a shared browser module.
