Essential Rated 5 out of 5 stars

Along with restoring a proper status bar with complete info, it also served unexpectedly as a 100% reliable alternative to Fission. It would be even better if the progress bars could be customized to use images as well.

This review is for a previous version of the add-on (2011. 

It can. S4E Preferences -> Progress -> URL Bar -> Browse and pick an image file. If you switch the editor to Advanced, you can use any valid CSS background rule (Just the rule value. The "background:" part is assumed).