This is surprising, since it carried over everything else (cookies, stored password etc). The easiest way to backup the bookmarks, is to click on bookmarks, select organize and then export to html. You can then import the bookmarks from the html file after you perform your upgrade.
I know there are a lot of articles that talk about the features, so I am not going to do that here. Instead, I will talk about some of the things that affected me.
- Some addons that work are removed (even though they still work), such as torrent-search bar. You need to go to their web site to reinstall.
- You can now easily click on the star next to the current url to bookmark it, so the arrow in version 2 has been removed. The arrow was useful if you want to reload the page without submitting your form. Now, you have to hit enter.