Yesterday, the Firefox team announced its latest version, Firefox 71. This version includes a plethora of new developer tools features such as web socket message inspector, console multi-line editor mode, log on events, and network panel full-text search. Many of these features were first made available in the Firefox Developer Edition and later improved based on the feedback.
Other highlights in Firefox 71 includes new web platform features such as CSS subgrid, column-span, Promise.allSettled, and the Media Session API.
Also, the links to scripts, for example, from the event handler tooltip in the Inspector or the stack traces in the Console, reliably gets you to the expected line and debugging sources loaded through eval() now also works as expected.