I am just hitting a bug due to Firefox 7 has removed some non-standard attribute (they have no moz- prefix) and cause my scripts fail on Firefox7. Ref: https://developer.mozilla.org/en/DOM/File
In order to prevent it happen again. I am interesting to get a list of API to be obsoleted. So that I can handle them before the browser release, without testing twenty alpha/beta/nightly build of browsers everyday.
It there any page, blog, or RSS who give warning before the feature disappear?