Still no live javascript editing, like Chrome scripts tab? This is a major setdown that prevents me from using Firefox. Chrome has that since so many years that

Still no live javascript editing, like Chrome scripts tab? This is a major setdown that prevents me from using Firefox. Chrome has that since so many years that I can't believe Firefox still hasn't got it. I think the latest Firefox releases are fast and good as browsers.. but as a developer, that's a showstopper.