For this example a Rich Text Format or rtf file is used called test.
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At this point you can either elect to "Save File" initial default or "Open with". If you select "Open with", you can then navigate after clicking the "Choose Once you have made a selection, checking the box "Do this automatically for files like this from now on. If at some point you decide to change the default action, you can open the action drop down and select "Use other In the example below Microsoft Word was added.
Properly Configuring Server MIME Types - Web security | MDN
At this point you can elect to view the "Applications Details One of the more common issues that arise in the Mozillazine Firefox Support Forum usually has subjects like:. Without getting overly technical it is instructive to provide a description of the cause of this. Most people, read humans, that use computers are familiar with and understand the meaning of various file suffixes.
They are predisposed to the idea that this is "how files are processed" by everything. In the case of files transferred from a web server to a browser, that is not correct.
Facing issues with Content-Type:application/x-download Content-Disposition:attachment
In other words, how a file is processed by a browser is determined by the Content-Type field in the http Response Header; the file suffix should be ignored when there is a Content-Type field. So, what is the problem? Web servers are complicated software packages.
They run from the quite common e.
There is virtually no support so the developer had better know what they're doing; which, is often not the case. To illustrate the point consider two examples.
- File upload set mime type as application/download instead of application/pdf.
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So what can you do? Usually you should try to inform the site's webmaster of the incorrect configuration. The Helper Applications panel in SeaMonkey 2 will open. Here, you can change download actions in the same way as explained above for Firefox 3. This will not affect media embedded in a web page - only links to the files themselves.
Certain file extensions may include multiple entries, one for each MIME type associated with that type of file. The Download Actions window will open. MIME types are not shown by default. MIME types that are not handled by plugins do not appear in the Download Actions listing unless you have previously encountered that type of file and checked the option in the "Opening" dialog box to "Do this automatically for files like this from now on", as described above.
After a helper application or "save to disk" download action has been set, that action will be taken automatically for those types of files. Sign up using Facebook.
Properly Configuring Server MIME Types
If the browser guesses the MIME type, this option is no longer available to the author. Some content types, such as executable programs, are inherently unsafe. For this reason these MIME types are usually restricted in terms of what actions a web browser will take when given content of that type. An executable program should not be executed on the user's computer and at most should cause a dialog to appear asking the user if they wish to download the file.
- Opening dialog.
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- File types and download actions.
- Incomplete list of MIME types?
- Quick Search.
- Why browsers should not guess MIME types.
MIME type guessing has led to security exploits in Internet Explorer which were based upon a malicious author incorrectly reporting a MIME type of a dangerous file as a safe type. This bypassed the normal download dialog resulting in Internet Explorer guessing that the content was an executable program and then running it on the user's computer. In Firefox, load the file and use Tools Page Info.
There are several steps which you can take to determine the correct MIME type value to be used for your content.