Important: Certain file extensions may include multiple content type entries, one for each MIME type associated with that type of file. Also, the SeaMonkey 2 Helper Applications panel does not allow you to add a new file type, as you were able to do in SeaMonkey 1.x. You are able to change an action to "Always Ask" for a content type, but you cannot remove an entry. Plugins are identified with "(in Firefox)" or "(in SeaMonkey)" after the handler name. You may need to depend on the icon or content description to determine the type of file. The (Helper) Applications panel shows the Content Type (also known as the MIME type), for example, "Wave Sound (audio/wav)", not the file extension. Web Feeds/Podcasts will also be listed as well as certain Internet protocols such as "mailto" or "rtsp".
(This applies to downloaded files only, not embedded content.) You can also set "Always ask" as an action for a listed content type (but note that the Opening dialog does not allow you to select a plugin action read Opening files using plugins for more information). You can manage what download actions are taken for file content types (MIME types) via the Applications tab in Firefox, shown here, and in the Helper Applications panel in SeaMonkey 2, shown below. Other download actions can be set from the Opening file dialog box that opens when you first encounter a particlar file type (see above). This section applies to all Firefox versions since Firefox 3 and SeaMonkey 2įirefox and SeaMonkey will use an installed and enabled plugin to open a downloaded file by default, based on its MIME type (see Issues related to plugins for more information). You can use the "Browse" button or click the drop-down menu icon and then click on "Other" to open a "Choose Helper Application" dialog, as shown here on Windows. You can choose to open the file with that application or you can choose or browse to a different application. The "Open with" option can show a "Choose" or "Browse" button, if no application is associated with the file type (shown here on Windows), or it may show a default application for the file type. Starting in Firefox 3 and SeaMonkey 2, the "Opening " dialog will also appear if you have selected "Always ask" as the action for the file's content type in your (Helper) Applications options/preferences ( see below). If you see an "Opening " dialog asking if you want to save the file or open it with a specified application, that normally means that your Mozilla application cannot handle the MIME type internally, no plugin is installed and enabled that can handle it and you have not previously selected a download action or helper application to always use for that type of file. When you click a link to download a file, the MIME type determines what action is taken.
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