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Firefox Portable 21.0

Developer: John Haller
Last updated: June 17, 2013
License: Freeware
OS Support: Windows (all)
File Size: 22.3 MB
Downloads: 3,964
∟ Last week: 26
User Rating: 4.4 / 5    (5 votes)

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Run Firefox from your removable/USB drive.

Portable Firefox is a fully functional package of Firefox optimized for use on a USB key drive. It has some specially-selected optimizations to make it perform faster and extend the life of your USB key as well as a specialized launcher that will allow most of your favorite extensions to work as you switch computers. It will also work from a CDRW drive (in packet mode), ZIP drives, external hard drives, some MP3 players, flash RAM cards and more.

What’s New:

  • NEW Support for Retina Display on OS X 10.7 and up
  • NEW Preliminary support for WebRTC
  • CHANGED Experience better image quality with our new HTML scaling algorithm
  • CHANGED Performance improvements around tab switching
  • DEVELOPER CSS3 Flexbox implemented
  • DEVELOPER Support for new DOM property window.devicePixelRatio
  • DEVELOPER Support for @supports added
  • DEVELOPER Improvement in startup time through smart handling of signed extension certificates
  • HTML5 Support for W3C touch events impemented, taking the place of MozTouch events
  • FIXED Disable insecure content loading on HTTPS pages (62178)
  • FIXED Improved responsiveness for users on proxies (769764)

Known Issues

  • UNRESOLVED If you try to start Firefox using a locked profile, it will crash (see 573369)
  • UNRESOLVED For some users, scrolling in the main GMail window will be slower than usual (see 579260)
  • UNRESOLVED Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
  • UNRESOLVED Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (see 802274)

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