December StatCounter metrics, compiled by Pingdom, show Symbian with a 33.59 percent share of the global mobile OS market. That’s more than Apple’s iOS, which claimed a 22.56 percent share that same month. And it’s more than Android, as well: Google’s juggernaut mobile OS accounted for just 21.74 percent in December.

Remarkable. More so when you note that Symbian’s market share actually grew about 3 percent over the course of the year, rising from 30.25 percent at its beginning to 33.59 percent at its end.

Of course, Symbian has long been among the world’s most popular mobile operating systems. It still dominates the Mideast and most of the developing world, thanks to the affinity of those regions for Nokia’s cheap mobile phones. And evidently it will continue to do so for a while. According to these metrics, there’s certainly quite a bit of life left in it still.

Here’s Mozilla’s full statement:

Our search relationship with Google remains positive for both of us. We are in active negotiations and have nothing further to announce at this time.  We have every confidence that search partnerships will continue to be a strong and growing generator of revenue for the foreseeable future.

Mozilla said it also has partnerships with other search providers, including Bing, Yahoo, Yandex, Amazon and eBay.

Mozilla’s overarching organization is a non-profit, but historically it has made most of its revenue via a royalty deal for searches made through the featured Google toolbar in its Firefox browser. In 2010 Google contributed 84 percent of Mozilla’s $123 million in revenue, as ZDNet writer Ed Bott detailed in a post questioning Firefox’s viability.

Google and Mozilla had in 2008 said their deal was extended to November 2011. That was a significant vote of support from the search giant as it was right around the same time as the first release of its own browser, Chrome.

But Mozilla hadn’t publicly indicated that the deal was extended past this November, Bott pointed out.

Now, three years later, Chrome has just overtaken Firefox for the first time in browser market share, according to the analytics firm StatCounter. The timing is eerily precise.

Last month Chrome had 25.69 percent share compared to Firefox’s 25.23 percent. Microsoft’s Internet Explorer still leads both of them.

I would add that I recently visited Mozilla’s new swanky top-floor San Francisco office with a deck directly overlooking the Bay Bridge (see photo above). The swanky setting didn’t project any particular concern about incoming revenue.

According to Mozilla’s official counter page, Firefox 4 has been downloaded more than seven million times so far. Impressive, but its first-day numbers were still short of the Firefox 3 release in June 2008, which actually earned a Guinness World Record for tallying eight million downloads in 24 hours. By comparison, Microsoft said its Internet Explorer 9, released last week, was downloaded 2.35 million times in its first 24 hours.

Update: Mozilla has now compiled its official 24-hour download count:

Within 24 hours of Firefox 4 being announced it had been downloaded 7.1 million times, this is in addition to the more than 3 million people who were already running the release candidate that became our final version

Note: screenshot is from a little more than 24 hours after official release.

Firefox faces ever-increasing competition in the browser market, though browser users do seem to be creatures of longtime habit. Internet Explorer was still the leading global browser as of February 2011, with 45.4 percent market share, according to StatCounter. It was followed by Firefox with 30.4 percent and Google Chrome with 16.5 percent.

Unsurprisingly, Symbian is the leading mobile OS worldwide. It’s dominant in some 100 countries and accounts for more that half of all mobile Web usage in 75 of them. It essentially owns the Mideast and most of the developing world, thanks to those regions’ affinity for Nokia’s cheap mobile phones.

Apple’s iOS is the second most used mobile OS worldwide, with its iPhone and iPod touch claiming the most mobile Web traffic in 30 countries. In 21 of them, those devices accounted for more than half of all mobile Web traffic. IOS appears most popular in Canada, Cuba (!), Switzerland and Australia, where it claims over 70 percent of all mobile Web traffic. Interestingly, it’s quite a bit less popular in the United States, where it garnered a little over 35 percent.

Research in Motion’s BlackBerry OS leads four countries, with one–the Dominican Republic–where OS usage is over 50 percent. Shockingly, in its home country of Canada, it accounts for a paltry 3.6 percent of mobile Web traffic.

And Android?

It leads just one country, South Korea, with a 78.3 percent share of all mobile Web traffic. Presumably, that’s thanks to Samsung, which is based in the country and sells a number of Android phones. So while Android is surging ahead, thanks to Google’s strategy of flooding the market with multiple handsets on multiple carriers at a wide range of price points, there’s still a hell of a lot of market share that it hasn’t even come close to touching.

[Image credit: Chart and data courtesy Royal Pingdom]

Troubling news for Microsoft (MSFT). Hitwise’s latest numbers are the second set of metrics from a Web analytics firm showing Bing’s market share in decline. Last week, StatCounter claimed Bing’s share of the U.S. search market in September had slipped to 8.5 percent from 9.6 percent in August.

As I noted then, while a month of slight decline might herald the beginning of a trend, it certainly doesn’t guarantee one–especially in search, where surges and lulls in market share are quite common. That said, this is the second set of data suggesting that Bing’s traffic may be leveling out. Whether this reflects the end of the big Bing marketing campaign or falling consumer interest remains to be seen.

Incidentally, Microsoft’s new search partner, Yahoo (YHOO), also saw its search share slip for the month, according to Hitwise. Yahoo claimed 16.96 percent in August. In September, it claimed 16.38 percent. Meanwhile, Google (GOOG) took 71.08 percent share for the month, up from 70.24 percent in August.

New metrics from Web analytics firm StatCounter show Bing’s share of the U.S. search market in September falling to 8.5 percent from 9.6 percent in August. Its share of the global market declined as well, slipping to 3.25 percent from 3.58 percent.

Microsoft’s (MSFT) new search partner, Yahoo (YHOO), also suffered a decline. Its market share fell to 9.4 percent from 10.50 percent in the U.S. and to 4.37 percent from 4.84 abroad. Meanwhile, Google’s (GOOG) September share rose to 80 percent from 77.8 percent in the U.S. and to 90.54 percent from 90 percent globally. (See chart below; click to enlarge.)

“The trend has been downwards for Bing since mid August,” StatCounter CEO Aodhan Cullen said in a statement. “The wheels haven’t fallen off but the underlying trend must be a little worrying for Microsoft.”

Mmm, I doubt it. While a month of slight decline might herald the beginning of a trend, it certainly doesn’t guarantee one, especially in search, where surges and declines in market share are quite common. Furthermore, we haven’t yet seen search metrics from Nielsen, comScore (SCOR), and Hitwise. And all three showed Bing gaining share in August, a month that Statcounter claimed shows the beginning of a downward trend.