It's too annoying that in Firefox version its replacing original URL (for example http-s://api.github.com/repos/tulios/json-viewer) with moz-extension://9d9f107e-28d1-4f57-a1b5-0913be97e86e/data/page/index.html?remote&href=https%3A%2F%2Fapi.github.com%2Frepos%2Ftulios%2Fjson-viewer

I, as a developer, need to change url that i testing, but it hard to do

But for chrome, and safari its haven't such "feature"