DOM Content and Load lines in Resources are unclear what they mean, we should add a tooltip over the lines to show what the lines are.
Created attachment 41063 [details]
Comment on attachment 41063 [details]
> + background-color: rgba(0, 0, 0, 0);
There is no background by default. You should be able to remove this. If you do need this, the "transparent" keyword is best.
Committed in http://trac.webkit.org/changeset/49479.