On Thu, 26 Jun 2025, at 20:05, Leonid G via Wikitech-l wrote:
> […]
> On a clear morning’s mind I’m very skeptical if this tool will solve my 
> issue. Wikipedia is not actively blocking the use of my browser. Its CSS 
> seems to have been changed so the pictures and maps do not show up.
>  
> So back to my question: can I do something in my side, except for changing 
> the system or the browser, to see the pictures and maps again? […]

The error symbol in place of the images means that CSS is not relevant here.

CSS is robust and protected against unknown rules. It's very rare that a CSS 
issue could cause an image to be hidden. The only way that CSS will hide an 
image, is if a developer intentionally applies a rule like opacity 0, display 
none, or visibility hidden. This could in theory be done as part of an 
animation, and perhaps the second part of such animation is unsupported, in 
which case it could remain hidden. This would be in our control to fix. 
However, if this was the case, the place where the image goes would be blank, 
not display the "broken image" symbol that you see.

As Tim points out, this symbol seems to only be there in your screenshot for 
certain image image types and not others (JPEG vs PNG). That further confirms 
there is no styling issue as that would apply to all image thumbnails equally.

Did you try opening it in a new tab? For example, open this link:
https://upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Old_map_of_Ryazan.jpg/500px-Old_map_of_Ryazan.jpg

This is a direct image URL. There is no HTML, CSS or JavaScript in our control 
when viewing this. If the image fails there, then there is most likely 
something defect in the browser or operating system. If you really want to rule 
it out further, I suggest to download ("save as") the JPEG image from this 
exact URL on someone else's computer, and send it to yourself / to this 
computer (perhaps by email) and then drag it into a new Firefox tab / empty 
browser window to view it. Does it work there? If that works, but the same 
image by URL does not, then we can revisit if there's something else going on.

-- Timo
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