311372 - page loading progress doesn't consider content loaded via CSS

Status: VERIFIED DUPLICATE of bug 253851

(Firefox :: General, enhancement)

Description

[Mugros]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20051006 Firefox/1.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20051006 Firefox/1.6

I noticed that the throbber is only rotating/active while the main webpage is
loaded on csszengarden.com and stops if the html is fully loaded. Unlike most
other sites the graphics shown on csszengarden.com are not referenced in the
html code but in the CSS file. So the user thinks that the page is fully loaded
but the graphics are still being loaded.
The effect is most noticable on dial-up connections or if your bandwidth is
already heavily in use.

I also noticed this on other sites but it is not so prominent. Sometimes
graphics appear from nowhere but the tab indicated that the page was already
fully loaded.

The browser should not differentiate between content referenced in the html and
the CSS.

Reproducible: Always

Steps to Reproduce:
1. load a csszengarden.com design
2. wait until throbber stops animating
3. look at page

Actual Results:  
Graphics in the page are still loaded and the appearance is still changing.

Expected Results:  
Keep throbber animating until all content that is displayed is loaded.

Comment 1

[Mugros]

*** This bug has been marked as a duplicate of 253851 ***