Developer Tools
Current browsers provide integrated developer tools, which allow to inspect a website. They let users inspect and debug the page's HTML , CSS , and JavaScript , allow to inspect the network traffic it causes, make it possible to measure it's performance, and much more.
See also
- Web development tools on Wikipedia
- Firefox Developer Tools on datarist
- Firebug (former developer tool for Firefox)
- Chrome DevTools on chrome.com
- Safari Developer Tools on apple.com
- Edge Dev Tools on microsoft.com