But those fixes often come with program-breaking bugs of their own, frequently creating errors in rendering and extension compatibility. Newly-compiled versions of the browser are typically available every weekday, at the very least. The nightly build includes cutting-edge updates from the open source Firefox project, actively fixing bugs and testing out new features. It’s considerably less stable than the full release. Most end-users don’t need to go near the developer edition, unless they’re really interested in a new feature in particular. This release may include more major tweaks to both the program and the Gecko rendering engine, some of which will graduate to the beta and stable versions, some of which won’t. The developer edition of Firefox is just what it says: an even earlier release primarily intended for developers of websites and Firefox extensions.

Features that make it to the beta are generally on their way to release, though they may not necessarily get there in the very next release. This version is for those who want access to the new features a little faster. The beta release is one “version” ahead of the stable release-at the time of writing, the stable build of Firefox is on version 53, but the beta is on version 54. Users of the stable release don’t get access to the newest tweaks and features, but it’s the one you want if you don’t like surprises in a crucial tool on your computer. All the features have been thoroughly tested and are ready for use by the general public. This is the current release of Firefox, the one that the vast majority of users have installed.

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