F12 | Inspect Element, Console

NEW: now Inspect Elements and check out the Dom tree along with the options to edit the source code of webpages and HTML nodes and see the changes live. (BETA)

F12 will provide you with options to inject custom JavaScript on webpages. You can interact in programming way with the webpages using the provided console. See the console logs, warning and Errors that webpages reports. Check the network traffics that a particular webpage is making. With Advanced Network mode enabled, you can get detailed information about the requests that webpages makes. Fetch all the medias that current webpage have loaded anytime.