Here’s yet another solution to those annoyed by tab scrolling. How about simply reducing tab width to show just the favicon? And that’s what the FaviconizeTab add-on does.
You can simply set to reduce the tab width to show only the favicon by double-clicking on the tab. You can also set the sites to automatically launch Faviconized through the add-on’s preferences.
All around, I seem to like this just a bit better than FishEyeTabs. Though sites without favicons are a problem.