I'm using Version 113.0.2 (64 bits), sorry I copy and paste my Software version from an other ticket.

@Aklapper I can reproduce it, using your link the download doesn't start. But download is also happening for me using Chrome, please double check this issue with this link: https://commons.wikimedia.org/wiki/Special:NewFiles#/media/File:Elemento_di_portantina_F1286_C2458-2.tif
or an other one (.tif) on the page.

Perhaps it is happening only with tif files?

I've changed my preferences for Firefox. With jpeg files, no problem to zoom. With tif files, a pop up open asking for what to do with the file. Actually, my setting on Firefox is exactly the same for jpeg and tif files.
The magnifying glass icon is not correct for the choice between download and open the file, a cursor would be consistent instead.

Chrome doesn't support in-browser viewing of tiff files. https://en.wikipedia.org/wiki/Comparison_of_web_browsers#Image_format_support

https://issues.chromium.org/issues/40757811
https://issues.chromium.org/issues/40966282
"TIFF is an extraordinarily complicated format with a huge surface area"

Maybe we can use something like this:
https://gist.github.com/nagman/9d934acd774cd5927129a8d11ece9689
to make a MMV test for tiff support and if it detects the browser doesn't support it, and disable the zoom ? (cause making jpg fullsize thumbs of the large tiffs might be more trouble than it's worth and takes several seconds).

I wanted to open a bug about this issue in https://commons.wikimedia.org/w/index.php?title=Category:Naso_brevirostris&uselang=fr#/media/File:Naseus_brevirostris_-_1700-1880_-_Print_-_Iconographia_Zoologica_-_Special_Collections_University_of_Amsterdam_-_UBA01_IZ13700059.tif by clicking at the center of the image, on the magnifier, but I have already did it 2 years ago... This is still happening on Firefox.