Personally, I have never used the Google Browser Sync extension (or anything of Google’s) but I know a lot of folks have. Bad news for you folks, Google has decided to ditch the Google Browser Sync extension. This means it is not going to made available for Firefox 3 and at the end of the year when Firefox 3.1 comes out and 2.0 is retired, Google will stop all support for the extension.
Here’s some information via Lifehacker
Thanks for trying out Google Browser Sync and for all of your feedback. It was a tough call, but we decided to phase out support for Browser Sync. Since the team has moved on to other projects that are keeping them busy, we don’t have time to update the extension to work with Firefox 3 or to continue to maintain it.
So are they are any alternatives? There’s Foxmarks Bookmark Synchronizer, but that only does your bookmarks, not history, cookies, passwords, and tabs between browsers. I am also hearing Weave created by The Mozilla Labs is going to be a good alternative, but it is still in developmental stages at this time.
News Source: CyberNet News