Sorry, that's the new default image for a missing favicon. There's nothing to "fix".

So, it's very ugly image.

Try to add this code to userChrome.css below the @namespace line.

• http://kb.mozillazine.org/userChrome.css
• http://kb.mozillazine.org/Editing_configuration

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

#page-proxy-favicon:not(src), .tab-icon-image:not(src) {
list-style-image: url("chrome://global/skin/icons/folder-item.png")!important;
-moz-image-region: rect(0px, 16px, 16px, 0px)!important;
}

thanks cor-el!

the ugly default favicon is just completely hideous...

adding the code you recommended above worked perfectly to banish it away! =)

p.s. I am using Fx 7.0.1 on a Mac running Lion.

You're welcome.

I had noticed that transparent block as well and this question was a good opportunity to see if there was a solution possible. A quick comparison and check revealed that the old folder icon is still present.

This code adds them also for bookmarks on the Bookmarks Toolbar.

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

/* default favicon */
#tabbrowser-tabs .tab-icon-image:not(src),
.sidebar-placesTreechildren::-moz-tree-image(leaf),
.bookmark-item:not(src):not([container]):not([type]){
 list-style-image: url("chrome://global/skin/icons/folder-item.png")!important;
 -moz-image-region: rect(0px,16px,16px,0px)!important;
}
.bookmark-item[container]:not([livemark]):not([query]){
 list-style-image: url("chrome://global/skin/icons/folder-item.png")!important;
 -moz-image-region: rect(0,32px,16px,16px)!important;
}

.sidebar-placesTreechildren::-moz-tree-image(title,container,livemark),
.bookmark-item[container][livemark]{
 list-style-image: url("chrome://browser/skin/feeds/feedIcon16.png")!important;
 -moz-image-region:auto!important;
}
.sidebar-placesTreechildren::-moz-tree-image(title,livemarkItem),
.bookmark-item[container][livemark] .bookmark-item{
  list-style-image: url("chrome://browser/skin/places/livemark-item.png")!important;
 -moz-image-region: rect(0px,16px,16px,0px)!important;
}
.sidebar-placesTreechildren::-moz-tree-image(title,livemarkItem,visited),
.bookmark-item[container][livemark] .bookmark-item[visited]{
 -moz-image-region: rect(0px,32px,16px,16px)!important;
}

woo hoo! that's even better. thanks =)

it's work, thanks

http://pastebin.com/raw.php?i=7f3nB8vT

Made my own attempt at messing with this stuff, starting from cor-el's css as a base.
Not really sure how much superfluous css I copied over since I'm honestly pretty terrible at this stuff, but yeah, it works so far as I can tell; don't think I missed the icon anywhere.

same problem and whoever said thats default for favicons that dont exist is completely wrong. I built alot of the sites I am having a issue with favicons for and they worked just fine prior to updating to 8.0. once i updated firefox half of my favicons that were there and displaying just fine before are not gone.

the-edmeister -- You said these are "missing favicon". Why are they missing while they weren't in 7.0.1? If they worked in 7.0.1, they should work in 8.0 also, which means somehow it could be fixed, am I correct?

The solution cor-el posted is for "advanced" Firefox users. I don't think most FF users know what he is talking about, unless they read all those instructions.

I think Mozilla should take the responsibility to fix this problem instead of asking their users to fix it.

That is a CSS change that the devs have made and if there is no favicon available you now get an empty square instead of the folder icon that you previously got. Try the about:config to see that in action.

If favicons are missing then try to restore them.

• CheckPlaces: https://addons.mozilla.org/firefox/addon/checkplaces/

cor-el -- I already have "checkplaces" installed and I'll use it to check. Since I have more than 4000 in my Bookmarks, I'll have to do it when I'm not using FF. I'll post my status when I finish. Thank you.

I agree with you. This a problem that should have been worked out in the Beta stage. Surely some must have picked it up. Why should normal users have to go and reprogram what up until now has been the best browser in my opinion.

A related bug report has been logged: https://bugzilla.mozilla.org/show_bug.cgi?id=685059

Please add your vote to raise the importance and get this "new feature" reverted!

I have decided against using "checkplaces" add-on trying to see if this problem can be fixed because I have almost 5000 bookmarks in my library and it'll take significant of time to check through them, once the checking is done, I have to go through the results and I just don't have the time to do that. So I'll just wait until FF fix it (which I think they should since these favicons worked in 7.0.1 and should work in future versions).

okay, but WHERE do you enter the code to fix this?

I agree! Mozilla should fix it for everyone; it's an obvious bug and a very visible one.

And while they are at it -- where are the color toolbar icons for: Home, Refresh, NewTab, etc. ? Version 8 defaults to ugly b&w buttons... surely there's a "classic look" format hiding in some forgotten code corner.

The problem with this code is that the folder icon turns into the blank page icon on a folder favorite on the bookmark toolbar.

For the square and empty icons, there is a workaround in this comment to the bug. Comment number 17. It works. Restore the favicon as it was before. As it was in Firefox 7.

https://bugzilla.mozilla.org/show_bug.cgi?id=701287

Thanks Teodor, Iceberg's solution to replace the omni.jar file works great and is the simplest fix now. Everyone should do this. The chromeuser.css trick is not exactly for people that are not "PC literate".