Mozilla Firefox 43 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 2015-12-15 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Firefox 43 is released with many new changes and security fixes. Among the new addition now private browsing is truly private and users have the choice of blocking trackers set by their own. Now Awesome Bar displays search suggestions which could eliminate unnecessary keying. 

Windows 8 machines can now can use On-Screen keyboard for input selection. In the multimedia front M4V video playback API is supported.Apart from known security fixes, this version fixed the error created by Eyedropper tool while zooming pages.

With this version on wards Telemetry data collection algorithm is used by Firefox for health reports. Ability to use Single processor mode is now dropped tolling NPAPI plugins.