Pale Moon is a custom-built and speed-optimized Firefox browser. The project uses contributed Open Source code to create a full-featured, speed-optimized browser based on the Firefox browser.
Users will find a slightly more conservative approach to changes in the user interface in the Pale Moon browser. It, although very close to Firefox, is (now more obviously so than before) a different product. However, these differences in layout do not prevent anyone from configuring their browser interface exactly the way they want it to look and work. Including Mozilla Firefox’s default layout if they so wish.
This is a new milestone release!
Following the change in direction, as announced on the forum and directly driven by user feedback and community input, Pale Moon is abandoning its own GUID (globally unique identifier) and adopting Firefox’s GUID instead to provide maximum compatibility with old and unmaintained Firefox extensions alongside those that are maintained on our add-ons site.
Please understand that this gives more freedom for people to use potentially incompatible and old/insecure browser extensions, but also means we will have a more “hands-off” approach to it from this point forward which as a consequence means you will have to resolve more issues yourself and take more care, especially when using external/old extensions.
Please note that our current add-ons site will, for a while, serve both older versions of Pale Moon and newer ones in a side-by-side manner, and you mustn't spoof your user agent when visiting the add-ons site or you may be served the incorrect type of add-ons or add-on updates, or not receive them at all.