User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729) Content-Type (MIME type) gets ignored if you want to save a file in Page Info / Media which has no file type extension. Reproducible: Always Steps to Reproduce: 1. Open attached testcase 2. Open Page Info window 3. Go to "Media" 4. Try to save the image Actual Results: Proposed filename is "0.htm". Expected Results: Filename should be "0.jpg" because the server sends: Content-Type: image/jpeg Saving files using "save target as...", "save image as..." or "save page as..." works as espected. I think this bug happens also in other OSes, but I can't test it.

Confirmed on Mac OS X 10.5.6 (nl_NL) / Firefox 3.5b4 (nl_NL). This is a bug.

Confirming setting to all platforms per Comment 2.

In addition to being annoying for us, this bug causes the feature to not work at all (e.g. on YouTube) for people who aren't filename extension geeks.

On Youtube people will be using custom flash downloaders.

If (1) they have Flash installed and (2) YouTube continues to default to using Flash for users with Flash installed, yes.