Mozilla Firefox 48.0

[baziroll]

ersion 52.0beta, first offered to Beta channel users on January 25, 2017
New

• Added support for WebAssembly, an emerging standard that brings near-native performance to Web-based games, apps, and software libraries without the use of plugins.
  
• Implemented the Strict Secure Cookies specification which forbids insecure HTTP sites from setting cookies with the "secure" attribute. In some cases, this will prevent an insecure site from setting a cookie with the same name as an existing "secure" cookie from the same base domain.
  
• Added user warnings for non-secure HTTP pages with logins. Firefox now displays a “This connection is not secure” message when users click into the username and password fields on pages that don’t use HTTPS.
  
• Enabled multi-process Firefox for Windows users with touch screens
  
• Enhanced Sync to allow users to send and open tabs from one device to another.
  

Fixed

• Improved text input for third-party keyboard layouts on Windows. This will address some keyboard layouts that
  • have chained dead keys
    
  • input two or more characters with a non-printable key or a dead key sequence
    
  • input a character even when a dead key sequence failed to compose a character
    

Changed

• Removed support for Netscape Plugin API (NPAPI) plugins other than Flash. Silverlight, Java, Acrobat and the like are no longer supported.
  
• Removed Battery Status API to reduce fingerprinting of users by trackers
  
• Improved experience for downloads:
  • Notification in the toolbar when a download fails
    
  • Quick access to five most recent downloads rather than three
    
  • Larger buttons for canceling and restarting downloads
    

Developer

• Enabled CSS Grid Layout, opening up a world of new possibilities for graphic design
  
• Improved security for screen sharing, which now shows a preview and no longer requires a whitelisted domain
  
• Redesigned Responsive Design Mode to include device selection, network throttling, and more