To see what percentage of Firefox users within the Chitika network are running each version of Firefox, Chitika Insights performed an analysis of the unique impressions seen within the Chitika Ad network and determined the share of these impressions represented by each respective version by analyzing the user agent of each impression. The following paragraphs detail the methodology behind the Firefox Version Tracker coming out of Chitika Insights.
Additionally, to learn more about why we calculated these numbers, be sure to check out our report on the first week’s worth of data.
Impressions
Determination: The browser/browser version of an impression can be determined through analysis of the user agent. All user agents pass a string similar to this:
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0
Reporting
Pie Chart: The percentage reported in the pie chart represents a rolling twenty-four hour average of Firefox traffic, with a six hour delay to ensure maximum continuity within the data. These percentages are simply the count of each particular Firefox version divided by a total count of all Firefox traffic observed.
Line Chart: The line chart highlights the use of each Firefox version on an hourly basis. For each hour, the methodology is the same as in the pie chart, except shown using a time series. For example, if Firefox 11 impressions made up 15% of all Firefox impressions on April 19 at midnight, and 16% at April 20 at midnight, the chart would highlight this growth (and show all of the hours in between).
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