515629 - image is not cached and is fetched from server on each css rule refering to it

Status: RESOLVED DUPLICATE of bug 497665

(Core :: Layout, defect)

Description

[Stas]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)

Since FireFox 3.5, an image seems to get fetched every time CSS rule is applied which has reference to the image. This eleminates usefulness of image sprites files. 

Last-Modified, Etag, Expires response headers are set appropriately.

Reproducible: Always

Steps to Reproduce:
1. Open firebug's net console 
2. Open http://www.alistapart.com/d/sprites/ala-image3.html
3. Hover image and observe GET requests fetching the same file.

Actual Results:  
GET requests fetching the same file for each css rule applied

Expected Results:  
Only one GET request fetching the image

Comment 1

[Steffen Wilberg]

Can't reproduce here.
Please try that with a new profile:
http://support.mozilla.com/en-US/kb/Managing+profiles

Comment 2

[Stas]

No, that didn't help me. Please refer to attached picture

Comment 3

[Stas]

Attachment: Firebug Net output

Here you can see the same picture fetched several times. The picture is referenced from CSS rules

Comment 4

[Stas]

Found duplicated