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Two in one for Mozilla Firefox

For the official launch of Firefox 3, the Mozilla foundation conducted a vast happening called "Download Day". The survey below presents the impact of this event on Firefox market penetration in terms of visits to European web sites.
  • Survey conducted from June 9 to 22, 2008
  • Perimeter of 110,405 websites
The triumphant arrival of Firefox 3…

On Tuesday, June 17, the Mozilla Foundation invited web surfers to take part in "Download Day", as part of the official launch of Firefox 3. The aim: triggering a worldwide buzz around Firefox 3 and making it into the Guinness Book of Records thanks to a record number of downloads within 24 hours. And it looks like Mozilla pulled it off, at least according to them, as Firefox 3 was apparently downloaded 8.3 million times in 24 hours (this figure is being checked by the Guinness Book).

In this survey, we look at the direct repercussions of massive downloading on the place held by this new browser among European web site visits.

The graph below illustrates daily changes in visit share held by Firefox 3 in Europe, compared with the visits clocked up by all browsers, from June 9 to 22, 2008.

And "Download Day" is plain to see: the average share of visits by Firefox 3 in European countries practically doubled between June 17 and 18, 2008:

  • From June 9 to 17, Firefox 3's market share is pretty stable…
  • before rising from 3.6% on June 17 to 6.5% on June 18, 2008 with the launch of its official release.

Firefox 3's share of visits then rises day by day to hit 9.3% on June 22, 2008, or almost one visit in every ten on average in Europe and a threefold rise during the week when "Download day" took place.


which already accounted for more than one Mozilla Firefox visit in four by June 19, 2008,

The graph below, that presents the average share of visits held by Firefox 3 in Europe within the Mozilla family, makes it possible to analyze the place taken by this new release of the open source browser among overall visits.

The observation is unequivocal: Firefox 3 has been massively adopted following the enormous communication happening on June 17. As a result, on June 17, Firefox 3 generated on average 11.7% of visits compared with 21.2% as of June 18, in one European country.

Although less clear cut, the rise continued during the following days and Firefox 3's share of visits among the Mozilla family therefore hit an average of 27.1% in Europe on June 22, 2008.


Accelerating the overall growth of the open source browser

The next graph below illustrates the daily change in the average share of visits using Mozilla Firefox in Europe out of the total visits for all browsers, from June 9 to 22, 2008.

"Download Day" not only made it possible to launch Firefox 3 with a bang, but also benefited Mozilla Firefox overall:

  • As a result, although the share of visits using Mozilla Firefox is equivalent on Monday, June 16 and Tuesday, June 17 (30.4% and 30.6% respectively) to the figures for Monday, June 9 and Tuesday, June 10 (30.2% and 30.5% respectively), this share increases from Wednesday, June 18: with 31% on that day vs. 30.5% on Wednesday, June 11. The same applied during the following days until Sunday, June 22 when Mozilla Firefox's share hit 34.3% vs. 33.4% on Sunday, June 15, a gain of almost one extra point.
  • In addition, the share of visits using Mozilla Firefox rose from Wednesday, June 18 whereas during the week preceding the launch, its share was stable from Monday to Friday and from Saturday to Sunday (with a weekend share that is always higher than during the week).

Although Mozilla Firefox had already passed the symbolic 30% share of visits on average in Europe since May 2008, the Firefox 3 launch on June 17, 2008 accelerated the overall growth by Mozilla Firefox during the last few days. The official arrival of this new version does not just amount to a simple renewal of Firefox 2 installations with Firefox 3 for hardcore red panda users: it most likely attracted new Firefox users.


Mozilla Firefox has pulled off a coup with the well noticed arrival of its latest Firefox 3 product which plays a part in enhancing their overall position in Europe.

Five days after the release of Firefox 3, results are more than positive…

See you soon in XiTi Monitor to follow up this evolution.


In the first part of the survey, the share of visits by Firefox 3 corresponds to visits made using this browser compared with all visits by all browsers.

In the second part of the survey, the share of visits by Firefox 3 corresponds to visits made using this browser compared with all visits by browsers of the Mozilla family.

In this survey, the European indicator seeks to be representative of the audited countries in its make up. In both parts, the average visit shares for a European country correspond to the average of the indicators for the 32 countries studied. As a result, behavior in a European country that generates few visits has an equitable impact on behavior across the continent.

For this survey, the 32 countries are:

Andorra, Austria, Belgium, Bulgaria, Croatia, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Monaco, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, the Ukraine and the United Kingdom.

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