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Firefox versions change too fast.

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Some development-tools refer to HTML/CSS features that work in certain version, but with 1 major-verions per 6 weeks we are at version 16 in one year.

No tool will provide glue what CSS level can be expected to work in which version.

For example "WeBuilder" assigns for CSS properties whether it works with CSS2 Css3 IE6 IE7 IE8 IE9 FF3 FF4

They will NOT maintain a list with 9 Version for FF per year !

Please use major version changes for major changes, but not as rollout counter.

Some development-tools refer to HTML/CSS features that work in certain version, but with 1 major-verions per 6 weeks we are at version 16 in one year. No tool will provide glue what CSS level can be expected to work in which version. For example "WeBuilder" assigns for CSS properties whether it works with CSS2 Css3 IE6 IE7 IE8 IE9 FF3 FF4 They will NOT maintain a list with 9 Version for FF per year ! Please use major version changes for major changes, but not as rollout counter.