

Run different Firefox versions simultaneously So, if you want to check it out, download and install Nightly. The engine renders web pages much faster than it ever did in the Gecko era.Īs of the writing, the ability to select and move multiple tabs has already landed to the Nightly version of Firefox. The user interface of the app is more responsive and it also starts up noticeably faster. Thanks to the changes made to the engine and the UI, the browser is blazingly fast. The browser now comes without support for XUL-based add-ons, so all of the classic add-ons are deprecated and incompatible.

They come with a refined user interface, codenamed "Photon". Modern versions of Firefox are built with the new Quantum engine.
