This extension adds a new "FaviconizeTab" option to the context menu of the tab.
When it is clicked, The width of the tab becomes small up to the size of favicon.
It returns to the former size when "FaviconizeTab" is clicked again.

I'm popping and commenting on Darkseid's clip rather than commenting on my own Faviconize clip to bring it to the top because I want everyone to be sure to check it and not think I'm just trying to promote one of my clips.

This little thing really has had a major impact on the ease and quality of my browser experience. It just updated the other day and you can now set it to work automatically with your regularly visited sites.

One little bug. If you use TabMixPlus--and I highly recommend that you do--you must reset FT's autofaviconize feature by unchecking, closing, opening and rechecking after making changes to your TMP settings. They will probably catch this soon and fix it in the next update.