For better perfromance of web page

• Avoids deprecated APIs
• Avoids third-party cookies
• Allows users to paste into input fields
• Avoids requesting the geolocation permission on page load
• Avoids requesting notification permission on page load
• Displays images with the correct aspect ratio
• Serves images with appropriate resolution
• Has a <meta name="viewport"> tag with width or initial-scale
• Page has the HTML doctype
• Properly defines charset
• Page has valid source maps