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Firefox's list of known apps

This is Firefox's list of known apps.

How do I add an application in there ?

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I had a problem with this procedure because I needed to add commandline parameters on the end of the application's file path, e.g "c:\program files\counterpath\bria.exe" -dial="%1"

So thanks, Kokbira, for providing the link to , which states:

"Mozilla applications stores file type and helper application associations in the mimeTypes.rdf file located in the profile folder. Sometimes you might not see an entry for the problematic file type in the Download Actions or Applications list or the listing itself might be completely empty. In such cases, exit the application, open your profile folder and remove (or rename) the mimeTypes.rdf file. (Don't delete the "default" mimeTypes.rdf file in the program folder by mistake.) A new copy of the file will be generated when you restart the application. You should then be able to download again without receiving the error but any previously set download actions will be gone. "

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Click "Browse...".

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Browse, Open with, Select from the drop down...
If you are confident on the app association, check the "do this automatically.." too.

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Do as @nik and @jon2512chua, because you cannot add directly an application to the list in Firefox, but only by that way; once you did it for a file extension, the program will stay in that list (called Helper Application).

More info, go there:

If there are some errors when opening with an application on Helper Application list, follow procedures:

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I might be ignorant, but what exactly does your answer contribute? – Daniel Beck Jun 15 '11 at 19:05
well, I improved my question after your comment; "it was a draft before it". it is different from others because it informs that after using, for example, Autocad to open a file extension, it will be added to the list for any file I'll open after that. – kokbira Jun 15 '11 at 20:05
That's what the question asked for: How to add an application to the list. I assumed all answers result in exactly that. – Daniel Beck Jun 15 '11 at 20:16
well I thought that way: they simply show the way, but who asked would not understand what happens later and would have some expectations to a better answer to appear. I tried to clarify that using an application to open certain file extension will add that application tho that list to later be chosen to open any kind of files - I think a more complete answer. Do you agree? – kokbira Jun 15 '11 at 20:26
You have improved your answer considerably and made it quite useful (+1) since my first comment by linking to further resources and adding explanations, yes. Still, your specific Autocad example in your comment was answered just as well by the others ;-) – Daniel Beck Jun 15 '11 at 20:42

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