If the icons have disappeared, they should reappear once a site is re-visited.

1. Presumably you are able to add and delete bookmarks as normal ?
   • Do new bookmarks get an icon ok ?
2. Maybe some extension is interfering.
   • Please try in safe mode with all plugins disabled, does that help ?
   • Diagnose Firefox issues using Troubleshoot Mode

John99,

Unfortunately, safe mode didn't work.

Now the details:

1. I can add new bookmarks, but only some of them get icons. More than that, some sites (like Firefox) will open the page with the icon in the left top corner and some (like Google) will just have a grey box.

2. I tried Safe Mode but it had no effect.

Can you post a link to one or more websites that aren't working?

Do you see the favicon on the tab bar?

Do you see the favicon if you add /favicon.ico to the domain part of the URL?

You can remove all data stored in Firefox from a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History > Show All History" or "View > Sidebar > History") or via the about:permissions page.

Using "Forget About This Site" will remove all data stored in Firefox from that domain like bookmarks, cookies, passwords, cache, history, and exceptions, so be cautious and if you have a password or other data from that domain that you do not want to lose then make a note of those passwords and bookmarks.

You can't recover from this 'forget' unless you have a backup of the involved files.

It doesn't have any lasting effect, so if you revisit such a 'forgotten' website then data from that website will be saved once again.

As an exemple, below are the sites without the icons on the tab bar: http://www.artisanbreadinfive.com/ http://www.google.com/

I've read about the favicons, but how can I add them if I don't see them? I haven't seen instructions anywhere.

I tried "Forget About This Site", but it didn't help.

Google should have a favicon, but the www.artisanbreadinfive.com site doesn't have a favicon (Content-Length: 0):

http://www.artisanbreadinfive.com/favicon.ico

HTTP/1.1 200 OK
Date: Mon, 12 Aug 2013 05:55:23 GMT
Server: Apache
Content-Length: 0
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: image/vnd.microsoft.icon

You can check these prefs on the about:config page

• browser.chrome.favicons [true]
• browser.chrome.site_icons [true]

• http://kb.mozillazine.org/about:config

You can let all favicons expire to see if that makes Firefox retrieve them on a next visit.

Copy and paste the JavaScript code in the Code input field in the Browser/Error Console (Firefox/Tools > Web Developer;Ctrl+Shift+J) and click the Evaluate button.

var fS = Components.classes["@mozilla.org/browser/favicon-service;1"]
         .getService(Components.interfaces.nsIFaviconService);
fS.expireAllFavicons();