What's New: News: Support for Windows 10. Added protection against unwanted software downloads. User can receive suggested tiles in the new tab page based on categories Firefox matches to browsing history . Hello allows adding a link to conversations to provide context on what the conversation will be about. New style for add-on manager based on the in-content preferences style. Improved scrolling, graphics, and video playback performance with off main thread compositing . Graphic blocklist mechanism improved: Firefox version ranges can be specified, limiting the number of devices blocked. Changed: Add-on extensions that are not signed by Mozilla will display a warning. NPAPI Plug-in performance improved via asynchronous initialization. Smoother animation and scrolling with hardware vsync . JPEG images use less memory when scaled and can be painted faster. Sub-resources can no longer request HTTP authentication, thus protecting users from inadvertently disclosing login data. HTML5: IndexedDB transactions are now non-durable by default. Implemented AudioBufferSourceNode. detune to modulate playback rate in cents, a logarithmic unit of measure used for musical intervals. Fixed: Kannada text does not display properly in built-in pdf viewer. Various security fixes. https://download.mozilla. org/?product=firefox-40.0-SSL&os=win&lang=tr