Last modified: 2011-03-13 18:06:49 UTC
The Wikipedia default edit toolbar is not displaying button images. Reloaded
page, reloaded Firefox, cleared cache, upgraded Firefox to latest 22.214.171.124 - no
improvement. Problem first appeared about two weeks ago.
Works fine for everyone else. Please provide details such as:
1) presence of any local "windows firewall" etc
2) which skin is selected in preferences
4) under what circumstances you have tested
Developer claims "Works fine for everyone else". Please verify.
Works in: Mozilla Firebird 0.7+ on QNX 6.21
Does not work in: Mozilla Firefox 1.5 on Windows 2000.
Does not work in: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:126.96.36.199)
Gecko/20060308 Firefox/188.8.131.52. Upgrade did NOT help.
1. No "Windows firewall" is present on Windows 2000 machine.
2. Default skin.
4. Browser plugins: FlashBlock. Repeated trials over a week. Worked until
Works fine in Mozilla Firefox 184.108.40.206 on Mac OS X 10.4.
Installed FlashBlock extension (1.33), they still work.
Created attachment 1629 [details]
Screen shot of all-text toolbar
As requested, here's a screen shot of the text-only toolbar.
correctly. But the images won't display.
I can only reproduce a similar behaviour if i disable images. But then the buddy
icon nor the wikipedia logo would appear!
Does it correctly handle that png images? That wouldn't be a satisfactory
explanation as http://en.wikipedia.org/images/wiki-en.png is png but could lead
On the other hand, you could see them before :S Try to see the images without
the toolbar: http://en.wikipedia.org/skins-1.5/common/images/button_bold.png
It depends on server load. When it is too heavy, sewrver denies image delivery.
Created attachment 1632 [details]
Button images as displayed in Firefox
The button images are readable in my browser when read directly, but not when
they're being read OK, they're in the browser's cache OK, the image site isn't
blocked, and Firefox can display them. They just won't display in the toolbar.
Still works absolutely here in Firefox on Windows XP. The fact that you
can load the images fine lends credence to it being some sort of extension
on your end that's breaking things deliberately.
Can you show a screenshot of your extensions dialog to confirm what's
installed and what versions?
Created attachment 1633 [details]
Firefox extensions dialog for failing browser
As requested, the extensions dialog for the failing browser.
(What's so striking about all this is that it all worked fine until about a
Reported by someone else on Wikipedia at
It was also reported at spanuich village pump on 2nd May. Using sistema Windows
I pointed him here, but seems it didn't come.
Still failing, and more Wikipedia users are complaining. See
John, can you do this for me?
1) Clear cache and clear your cookie for en.wikipedia.org.
2) Install "Live HTTP Headers" extension
(from http://livehttpheaders.mozdev.org/ )
3) Open up 'Live HTTP Headers' window from the Tools menu
4) Click the 'Config' tab
5) Uncheck 'Exclude URLs with regexp'
6) Leave the window open, but click over to a regular Firefox window.
7) Go to http://en.wikipedia.org/w/index.php?title=Wikipedia:Sandbox&action=edit
8) Go back to the 'Live HTTP headers' window, click on the 'Headers' tab
9) Click 'Save All...' to save the recorded HTTP data to a file.
10) Attach the file here.
Sorry, we don't install browser extensions. Perhaps if you asked on Wikipedia
Village Pump you might find someone willing to do this.
You seemed to have no problem with installing Flashblock
(visible in your screen shot) yet you're not willing to
help diagnose the problem you keep complaining about?
Created attachment 2282 [details]
Capture of HTTP Headers
Make a full refresh (Ctrl+F5). You should be loading a lot more items
Created attachment 2283 [details]
Capture of HTTP Headers
Created attachment 2284 [details]
Capture of HTTP Headers from private mediawiki server
This is the traffic between firefox and "my" private mediawiki(1.7) server
The "toolbar" problem only apears only on my firefox (220.127.116.11) on windows XP
(firefox (18.104.22.168) on another computer have no problem)
Maybe, the problem is related to flashblock
I also use this extension, i tried to disabled and uninstalled it
but with no effects
Maybe, flashblock change some firefox files which are not restored upon
It seems you have a proxy between you and the server. This proxy is probably
called http://isa-4.oddo.fr/ It is stopping you once and again from delivering
the data, asking for authentication. Then your broser autentifies and is 'logged
in' for a couple of requests. Then the proxy asks for auth again...
For pages you authenticate and it works. For images, you authentiate but the
proxy denies authentication. However, some images pass the third time.
This proxy is a good candidate for being guilty.
Your brwser doesn't seem to _ask_ for the images so it could also be the js is
not properly giving it to you. Does flashblock (or any other extension you use)
have the ability to change you browser identification? (what matters is in front
also be of importance (but then you shouldn't see the toolbar at all! :S)
I saw the proxy messages in the capture id=2283
so i created the capture id=2284 where no proxy are involved
I'dont know a lot about flashblock, but i don't think it change my browser
I installed User Agent Switcher and switching my identification to
doesn't change anything :-(
I'll try to find a computer where i can test if flashblock is responsible or not
Here's the problem, and how to fix it.
Those buttons are no longer part of the static page; they're being added by
Firefox can be in a configuration state where trying to change the "src"
but the change does not take place. If "dom.disable_image_src_set" is set to
"true" in "about.config", such changes are prohibited, and the buttons will
disappear. Google Maps won't work. either.
This is likely to have happened for users who upgraded from Firefox 1.0 to 1.5
or 2. Firefox 1.0 had an options check box which controlled this configuration
parameter, as part of some early attempts at ad filtering. That option check
box was removed in 1.5, but users who upgraded from 1.0 are then stuck at their
old setting. The Firefox upgrader didn't handle this well.
If you open "about:config", find "dom.disable_image_src_set", and reset it to
the default value ("false"), the buttons should reappear.
Can this be marked as resolved now?
Created attachment 5450 [details]
Check for dom.disable_image_src_set
I don't think so. It's still the same issue if someone has dom.disable_image_src_set to true (although few people will do now).
I think this should be reported upstream. It's a Firefox bug that the image src can't be set before it is attached to the document DOM.
What we can do is to detect the problem and show an error message. I attach a proposal. It just shows a hardcoded string on the toolbar if it was unable to set the src property of the image, it's so uncommon it isn't worth to localize.
WONTFIX - This appears to only apply to ancient versions of Firefox and people with odd custom settings, I don't see why we should go out of our way to support this.