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A Week in the Life of a Browser: Analysis

These are some analysis from A Week in the Life of a Browser. The graphs on this page are based on the data submissions we received from Test Pilots running Firefox versions 3.5 and above, since December 13th, 2009.

Bookmark and bookmark folders
Sample size:approximately 5,000 submissions
Submission Time: December 13 - 21, 2009

  1. Bookmarks
  2. Bookmark folders
  3. Bookmark folder depth

Browsing session length
Sample size:approximately 6,000 submissions
Submission Time: December 13 - 22, 2009

    Coming soon!

These analysis are generated based on early raw data, and they may not be super definitive or representative for all Firefox users. We are looking for help to firm them up! Please join the Test Pilot discussion group if you have any suggestions or questions.

Also, if you would like to do your own analysis of the data from this study, you can download samples of it here.

Bookmark and Bookmark folders

The following graph illustrates the distribution and amounts of bookmarks and bookmark folders people use in Firefox, and the data sample is about 85% of total 4913 submissions of the study.

The x-axis: The amount of bookmarks people use.
The y-axis:The amount of bookmark folders people use.
The unit: Count of submissions. e.g: Each blue hexagon represents 20 submissions and each red hexagon represents 140 submissions.

Question: How many bookmarks do people use?

The x-axis:Amount of bookmarks.
The y-axis: Popularity density.

Question: How many folders do people use to manage their bookmarks?

The x-axis: The amount of bookmarks folders.
The y-axis: Count of submissions, e.g. the second column means over 350 submissions indicate that there are 2 bookmark folders are existed.

Note: When people start to use Firefox, the browser has already created a folder "Mozilla Firefox" for the user.

In this case, if people do not delete this folder, the amount of folders created by users themselves will be N-1. E.g. the second column means over 350 submissions indicate that there are 2 bookmark folders are existed, and 1 is created by user themselves or through other applications, if users do not delete the "Mozilla Firefox" folder.

Question: How deep are those folders that people use to manage their bookmarks?

The x-axis: The amount of bookmark folder level.
The y-axis:Count of submissions, e.g. the first column means over 1500 submissions indicate that there are only 1 level of folders and no sub folders within them.

Note: When people start to use Firefox, the browser has already created a folder "Mozilla Firefox" for the user.

In this case, more than 50% people have at least one subfolders to manage bookmarks, and some people have 6 layers of folders in its hierarchy.

Statistics of Bookmarks, Folders, and Folder Depth

BookmarksFoldersFolder Depth
Minimum0.00.00.000
1st Quartile59.05.01.000
Median172.019.02.000
Mean608.159.62.108
3rd Quartile509.257.03.000
Maximum41418.02765.012.000