SpeedSentry: Website Performance Monitor 作者: ABC8

Measures and displays page load times
Shows DOM Interactive and DOM Content Loaded times
Counts the number of resources loaded
Displays memory usage (if available)
Color-coded badge indicating performance (green, yellow, red)
Customizable performance thresholds
Option to choose which metric to display on the badge
Notifications for slow-loading pages (optional)
Refresh button to update performance data
Options page for easy customization
Persistent settings across browser sessions