Why do you need the Firefox Nightly browser?

Question

IDE

Why do you need a Firefox Nightly browser?
How is it different from Firefox Developer Edition?
Is there a 64 bit version of Firefox?

Answer 1

Why do you need a Firefox Nightly browser?

These are night builds. That is, Mozila programmers are programming there and every night a new version of Firefox is being built. Primitively speaking, this is the latest version of Firefox, read alfa & beta.
This is a version specially tailored for people who make websites. THAT is this version of Firefox has an extended set of tools for site building.
November 3 Mozilla to release 64-bit Firefox for Windows
64-bit Firefox Developer Edition 38 for Windows

Answer 2

Nightly version for testers and developers.
For windows it seems like there is already a 64 version

Answer 3

These are "nightly builds, something like a beta version of the browser that are updated every 24 hours, if you type about: telemetry in the address bar of the browser, you will see browser telemetry, such things as page loading speed, speed of execution of various algorithms are written there, all failures and errors are also recorded there crashes, and much more all this information is sent to Firefox which helps to improve the browser thousands of people around the world use Firefox Nightly on their PCs to improve firefox I myself have been doing this for a year and a half and it really helps