In the last (live) version of my site I setup custom cursors to add to the theme of my site (though they only work in IE). If I use them in the upcoming version I will probably call the cursor URLs via an IECCSS.
However I've noticed that Firefox will request cursor files several times. I'm not posting this so much as Firefox's interaction with weird CSS but as I may be curious if this is an attempt to increase it's perceived market share when ratios are measured simply by hits? I of course use Firefox and I am wondering if it's not a proper mimetype in contrast for example.
The real reason is the multiple fetches has a draw down effect on the power grid and slants the internet in the general direction of Firefox users. This has the affect of draining data from other browsers making them appear slower, or failing altogether. Even though these multiple fetches would slow down the FF browser, it is insignifcant to the drain placed on the other browsers.
Microsoft claims this slanting of the internet also causes a tilting of the Earth's axis resulting in global warming. Hence, the change in the melting of ice glaciers, an increase in hurricanes, tsunamis and other weather related tragedies. Microsoft also states they had warned of these dangers of open source projects in the past and we are now seeing the effects.
There have been a few arguments saying that Firefox's increasing market share is somehow to do with various "tricks" such as pre-fetching, favicons or in this case cursor files. Whilst pre-fetching may be an issue for increased pageviews in some circumstances (albeit with a very limited effect), the fact that FF is downloading a cursor file is irrelevant to market share.
I am wondering if it's not a proper mimetype in contrast for example.
I'm not sure of the gist of your question here - are you wondering if the page mime type is influencing Firefox behavior or the mime type of the cursor files themselves?
I'm saying the mimetype of the cursor may be off or unrecognized so Firefox may be trying to download it to figure it out for itself.
While I know relative ratio (my heavy use of Firefox versus someone's light use of IE) does not represent actual statistics of the browser market shares that is how they are measured ultimately as no one can go to all the internet access points on Earth and manually count who is using what browser.