In Firefox 3 and later (and probably older versions), selecting content within an iframe always seems to use the grey selection background colour used for a document that doesn't currently have focus, even if the iframe does have focus. The only exception I have been able to find is when the content within the iframe is editable. This is not the case in other browsers. Here's an example illustrating this:
This unfortunately prevents styling the selection within an iframe using the
::-moz-selection CSS pseudo-element because it only applies to non-grey selections:
My question is: is it possible to prevent an iframe's selection being grey in Firefox without using
This only seems to happen on dynamically written iframes: using a separate file and the
src attribute solves the problem. However, I do need it to work with dynamically written iframes.
I just tried to reproduce the problem with a "real" page as iframe content and then it works like you want: blue colored selection! (FF 5.0)
It seems only generated content has this problem, so you could make a page (php/asp(x)) that generates the content for you to circumvent the problem.
A simple example script: http://jsfiddle.net/97Vjz/9/