Mozilla Firefox 54 is a web browser developed by Mozilla Foundation, available for download in full install version for Windows platforms from legacy sources. This version of Firefox was officially released on 2017-06-13 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Major change in the release of Firefox 54 is the support for multiple content processes, which is Mozilla's goal to create a browser based on Goldilocks principle, a method which a optimal use of speed and memory leading to fast and stable browsing.

Improvements in user interface includes simplified download button & download panel status and moving mobile bookmarks folder to main bookmarks making it easier to access.