Earlier quoted context omitted.
Firefox has had development tools from way before Chrome even existed. They started as an (awesome!) Firebug extension, which they later included in the browser itself (not that it matters, but it was Chrome that basically copied them at the time).
Was looking for this comment! This is key here, because the story is extra sad given Mozilla/FF's initial strong surge in leader front-end developer tools. Before the Firebug extension I think I just did like View Source still from the menu? Yikes! Chrome copied it and at first IMO it wasn't nearly as good inside Chrome as in FF. But that did eventually change and for some years now I (sadly) agree I also prefer Chro…
Back in the days when Mozilla put a focus on the needs of power-users and developers...
It's hard to pin down a single point where they dropped that ideal, but it's definitely long gone now.