Here's an answer to your first question:
Stream files instead of downloading
mozillaZine Knowledge Base Article: http://kb.mozillazine.org/Streaming_media_%28Firefox%29
In both Internet Explorer and Firefox, you can click a download link and have the browser open the file in a program, instead of just donwloading it to a specified location. In the case of media files however, IE
can have a media player stream the file whereas Firefox will still download the file first before opening it (or Firefox will open it in the browser with the associated plugin, if there is one).
Firefox can duplicate IE
's behaviour in several ways. One is with the DownloadWith extension. It is an extension that lets you choose another program to download a file by right-clicking on the link . If you specify a media player for a media file type, then the player will stream the file.
Install the enhanced version of the extension from here: http://www.extensionsmirror.nl/index.php?showtopic=203
And use the sample downloader settings that correspond to the media player that you use: http://downloadwith.mozdev.org/configurations/configurations.xml
While this extension will work in Firefox 1.5.x.x, it needs to be modified slightly before it will install. Instructions on how to do that are here: http://kb.mozillazine.org/Updating_e...ions_for_a_new_application_version
It can be configured to automatically stream links, but I haven't figured that out yet.
The Launchy extension will also allow this. When you right-click on a link, Launchy will provide you with a list of external programs that you can use to open the link. Right-click on a link to a media file, and you can open it directly with a media player without downloading it first.
The extension can be obtained from here: https://addons.mozilla.org/extensions/moreinfo.php?id=81
If you want to use an external application that Launchy does not list, see its homepage for instructions on how to add it.
A third method is to follow the Quicktime Guide to associate the desired file types with the Quicktime Plugin. When you click on a link to such a file, Firefox can use the Quicktime Plugin to stream it within a browser window instead of prompting you to download it. Once it has fully downloaded (once the slider is fully grey) you can just click File > Save Page As to save the file.
If all else fails...