I thought this was fixed, but it's not. I'm using FF Portable 13. I know FF is trying to do away with favicons in the address bar, but I thought they were leaving them on the bookmarks toolbar. I have a very strange glitch. Suddenly, the Facebook icon is a left arrow, but all the others are fine. The FB favicon shows in the address bar and tab, but on the bookmarks toolbar, it's the right arrow. I used an add-on to reset it, but the minute I go to FB, it changes back to the arrow in the bookmarks toolbar. What I've Done: deleted the favicon and dragged it back down from the address bar deleted the bookmark through the bookmark manager and added it back through bookmarks instead of dragging Used Bookmark Favicon Changer add-on to reset the favicon, but it keeps reverting back Nothing works. It's so strange that it has only affected FB. ETA: I think I fixed it. I used Bookmark Favicon Changer to reset it, then exported it, then changed it to the exported .png image. It seems to be staying put. Thank heaven for add-ons!