* The stop/reload button has moved to the right end of the URL bar.
* The status bar is gone; URLs appear in ghosted text on the right side of the URL bar when you hover over a link.
* You can enable an "add-on bar", which appears to be a replacement status bar that add-ons can add icons to. None of the add-ons I have installed (about 20) are making use of it, so the transition from overlaying the status bar to overlaying the add-on bar must not be automatic.
* In the Add-ons Manager, an explicit "Remove" button has replaced the small "X" icon that used to be used for uninstalling an add-on.
* The stop/reload button has moved to the right end of the URL bar.
* The status bar is gone; URLs appear in ghosted text on the right side of the URL bar when you hover over a link.
* You can enable an "add-on bar", which appears to be a replacement status bar that add-ons can add icons to. None of the add-ons I have installed (about 20) are making use of it, so the transition from overlaying the status bar to overlaying the add-on bar must not be automatic.
* In the Add-ons Manager, an explicit "Remove" button has replaced the small "X" icon that used to be used for uninstalling an add-on.
* A more colorful throbber.