Take a look here, the tag page:

As far as I know this is Firefox official logo: (original)

I'm pretty sure it used to be that official logo until recently but now it's suddenly changed to blue and toothless theme of Mozilla foundation. (This appears to be the original)

I wouldn't really mind unless discovering another oddity: that new logo is hosted on imgur, while all other sponsored tag icons I encountered are hosted on http://cdn.sstatic.net e.g. logo url is http://cdn.sstatic.net/stackoverflow/img/tag-logo-android.png and logo url is http://sstatic.net/stackoverflow/img/tag-logo-facebook.png

So who is responsible for those icons? Has Mozilla foundation itself decided to change the logo?

  • The Android thing isn't always hosted on the CDN. If you look at Nicks answer here i.stack.imgur.com/tKsDb.png is the Android logo and that's hosted on imgur. – ben is uǝq backwards Nov 6 '13 at 13:21
  • @ben sorry didn't find anything related in that answer by Nick... anyway it's not relevant, it was moved there temporarily by Geoff and don't think it's in use. – Shadow Wizard Wearing Mask Nov 6 '13 at 13:23
  • I was responding solely to your oddity; I'm saying that it's not always true... some sponsored tag icons are hosted on imgur, for the homepage at least. – ben is uǝq backwards Nov 6 '13 at 13:25
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    You guys are only seeing half the story, somewhere on the Mozilla site is bubbles, FIND BUBBLES! FREE BUBBLES! BRING BUBBLES HOME! – Nick Craver Nov 6 '13 at 13:42
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    I wish I was good at Photoshop. I would put Waldo's hat on top of the fox. – Andrew Barber Nov 6 '13 at 14:50
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    @AndrewBarber Challenge accepted. Ok, it is super low res, and with Paint, but still. – Bernhard Barker Nov 6 '13 at 17:08
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    @Dukeling hehe... awesome! Though I would have put the hat on the entire logo, not just the fox ;) – Andrew Barber Nov 6 '13 at 17:09
  • Looks like someone is going to make a hat outta fox's fur. – Deer Hunter Dec 27 '15 at 8:23

The short answer is: this is the logo Mozilla sent us in their package of materials for their tag sponsorships (note this logo is also used on and ).

To get to the bottom of where this logo comes from, just take a look at the logo for the Mozilla Foundation:
If you still don't see it, black out the dino head...
...and from there, I hope you can see where this logo comes from:
I can't speak to exactly why the logo above is being used, but I can assure you it was sent directly from Mozilla to the Ad Sales team here at SE.

Regarding the use of cdn.sstatic.net versus imgur:
We used to use the former for hosting those logos for tag spsonsorships, now we use the latter. Note that the examples you cite, and are sponsorships that have been around for a long time. Take a look at a more recent (though not that recent) example in : https://i.stack.imgur.com/SeoON.jpg

I hope that clears everything up! :)

In the comment thread of an article posted on Hacker News, Robert Nyman (Technical Evangelist for Mozilla) said the following:

Yes, I do. :-) That logo is the new logo for MDN, our network for developers at Mozilla. Since Stack Overflow is a resource for developers we see a direct connection to that. Also, we have different foxes for different products, so that would probably be confusing - rather have one consistent look.

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    Can I get some freehand circles to show what you're talking about with the logo? – Kasra Rahjerdi Nov 6 '13 at 20:42
  • Awesome, thanks a bunch! Think I found another bug now, i.stack.imgur.com/SeoON.jpg won't load for me while i.stack.imgur.com/SeoON.jpg works fine. – Shadow Wizard Wearing Mask Nov 6 '13 at 20:43
  • And make sure those freehand circles are red, or else. – Servy Nov 6 '13 at 20:43
  • I feel like I'm going to kick myself when I figure this one out... – Andrew Barber Nov 6 '13 at 20:47
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    BTW the short answer is: "Mozilla themselves stole the fox and replaced it with a dino". :-) – Shadow Wizard Wearing Mask Nov 6 '13 at 20:51
  • @AndrewBarber can't you see the similarity between the images? – Shadow Wizard Wearing Mask Nov 6 '13 at 20:53
  • @ShaWizDowArd I can. I just don't know what that last logo is! heh – Andrew Barber Nov 6 '13 at 20:53
  • @AndrewBarber think it's just a blue theme to the old logo, no special meaning. – Shadow Wizard Wearing Mask Nov 6 '13 at 21:46
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    Someone should poke Mozilla that the firefox logo fits much better, especially when used in such a small size. – ThiefMaster Nov 19 '13 at 1:06
  • Cool, their plan finally revealed! :-) – Shadow Wizard Wearing Mask Nov 19 '13 at 23:59

This is the logo for the Mozilla Developer Network, not the Firefox logo: MDN

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