507914 - Cacheable images are requested multiple times (with hard refresh)

Status: RESOLVED DUPLICATE of bug 497665

(Core :: General, defect)

Description

[George Georgovassilis]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 (.NET CLR 3.5.30729)

When an HTML document requests an CSS image sprite (which is cacheable), FF will launch new HTTP requests as long as the image has not finished loading yet.



Reproducible: Always

Steps to Reproduce:
1. Empty browser cache
2. Activate network panel for Firebug
3. Navigate to any site that uses cacheable CSS image sprites, i.e. http://de.yahoo.com/?p=us

Actual Results:  
Multiple requests to the same, cacheable image (i.e. trans.gif)

Expected Results:  
Just a single request to any cacheable image.

Comment 1

[Ria Klaassen (not reading all bugmail)]

Tested this with the latest trunk build on Windows Vista, but couldn't reproduce the issue.
With a new profile I visited the site creating a HTTP log and searched in this log for multiple requests for trans1.gif.
I found only one request: GET /i/i/eu/hp/trans1.gif HTTP/1.1

Comment 2

[Michael Ryan]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1

Can't reproduce.

Comment 3

[Matthias Versen [:Matti]]

Reporter:
Please test in the Firefox safemode (=without all addons) and either use your own webserver, use a packetsniffer or create a Mozilla HTTP log.

Comment 4

[George Georgovassilis]

Attachment: HTTP log fro yahoo.de

Comment 5

[George Georgovassilis]

Ok Matthias, did as you said (attached log in comment4). Please note the extra http requests for trans1.gif. This behaviour is exhibited during a page reload with crtl+F5, not a regular load.

Comment 6

[Ria Klaassen (not reading all bugmail)]

Indeed with a hard refresh more requests for the same item are made. About 10. 
This is a regression from Firefox 3.0.
Not sure was the cause of the problem is, so it is not clear either what the correct component should be.

Comment 7

[Ria Klaassen (not reading all bugmail)]

Putting it into Core > General for now.

Comment 8

[Matthias Versen [:Matti]]

don't do a shift+reload, that is bug 497665.
I assume that you always meant a forced reload and will mark it as dupe of bug 497665