Mozilla Firefox is an open-source web browser created by the Mozilla Foundation. It supports almost all of the common web standards in use today, and holds approximately 20% of the market share. Firefox is available for Windows, Mac OS X and Linux. Firefox uses the Gecko rendering engine.
Firefox, as of version 3.0 supports the following standards:
- HTML 4
- CSS 2
Firefox also partially supports the following standards:
- CSS 3
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