This is a very short post, but it’s worth putting up because it shows how browser features go from a vendor-specific implementation to a fully supported standard.
In Firefox 3.5 we no longer support the Mozilla-specific CSS property
-moz-opacity. Developers wanting to set the opacity of an element should use the standard
<a href="https://developer.mozilla.org/en/CSS/opacity">opacity</a> property instead.
We introduced the
opacity property way back in Firefox 0.9 and
-moz-opacity was deprecated. And with Firefox 3.5 we’ve finally removed it.
A long road for a simple property, but it’s worth mentioning so people understand the time scale for these kinds of features and how they relate to standards.