I got this misterious FF error trying to download a filter from FF web

I tried to download a filter from the online library and I got this error shown here below

I then tried to open FF first and then download the filter, but no, I go the same error

Then I tried another tow different filters to see if the problem was with a specific filter, but no, it happens the same with all the filters

I have to say that this has been with the "wonderful" and "lovely" Internet Explorer 9 (I do not know why I keep using it when I have other 4 excellent browsers)

After this I opened another browser and went to FF online library and tried to download a filter and PERFECT, NO PROBLEM AT ALL. Downloaded and opened FF very well.

Also tried another browser and also went well, so the problem must be with IE 9.

So I will not use more IE 9 to download filters, because this is not the first time, have happened something similar others times before,although not always.

So as with any other browser it works well, the better is not use IE 9.