- Added filter support to browserContext.clearCookies() and introduced testInfo.tags property for accessing test tags during execution.
- Implemented retain-on-first-failure tracing mode and new conversion methods locator.contentFrame() and frameLocator.owner() for easier frame handling.
- Enhanced UI mode with visible tags, tag filtering shortcuts, and new keyboard shortcuts (F5 to run, Shift+F5 to stop, Ctrl+` to toggle output).