Platform/Layout/CSS Compatibility

Here's a summary of the data collection and analysis that has been conducted regarding the use of various CSS vendor-specific prefixes.

The current datasets, collected by John Jensen, are:

Completed in November 2011
Summary of 88,000 CSS files from top 30,000 sites on the web, collected using Desktop FF 8.0 User-Agent
Tables and summary reports in https://bugzilla.mozilla.org/show_bug.cgi?id=708406
Written report and summary tables are attached to the ticket.
Summary file, in CSV format, is 620MB compressed, 7.2GB uncompressed, available at http://analysis.net/moz/css.csv.gz

how many sites in your mobile Webkit browser crawl use at least one of 'transition', 'transition-timing-function', 'transition-duration', 'transition-property', 'transition-delay' (ignoring prefixes)?

1245 / 30087 = 4.13%

how many use them only with -webkit prefixes (no -moz or unprefixed versions of the properties)?

336 / 30087 = 1.12%

how many use them only with -webkit prefixes and unprefixed (no -moz versions of the properties)?

365 / 30087 = 1.21%

For each CSS prefix for which there are both -moz- and -webkit- prefixes, what percentage of domains host CSS that uses only the -webkit- version and not the -moz- or unprefixed version?

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