What’s New Portable edition has been also provided since now. It will create a profile folder “Firefox (Profile)” if needed. Firefox 3.1 will become 3.5, hence the next build will be Firefox 3.5b4 Use P2 If in doubt Update adobe flash from 10.0.12.36 to 10.0.22.87 for some security vulnerabilities Mozilla Firefox 3.1b3 Official Release Notes Firefox 3.1 Beta 3 is based on the Gecko 1.9.1 rendering