mimetype.rdf file doesn't remember saved file type extensions fix

Binary package hint: firefox-3.5

mimetype.rdf file doesn't remember saved file type extensions fix

Firefox has had a very annoying bug whereby trying to save different file-type extensions like .rar, .r00, .r01 etc doesn't activate the greyed out box "do this automatically for similiar files from now".
So you are forced to "Save File" each and every time whic is maddening.
After much frustration I finally sorted out this annoying problem FireFox has had for yonks.

I opened the file mimeTypes.rdf found in your FF profile directory with a simple text editor like Notepad.
Then if there is no entry for "rar" etc search for an ending sequence "/>
" (without quotes)
Then insert the following chunk:-

  </RDF:Description>
  <RDF:Description

RDF:about="urn:mimetype:application/x-rar"
                   NC:value="application/x-rar"

NC:editable="true"
                   NC:fileExtensions="rar"
                   NC:description="WinRAR archive">

<NC:handlerProp RDF:resource="urn:mimetype:handler:application/x-rar"/>

Subesquent chunks can be for any other .ext:-

  <RDF:Description

RDF:about="urn:mimetype:application/octetstream"
                   NC:value="application/octetstream"

NC:editable="true"
                   NC:fileExtensions="r00"
                   NC:description="WinRAR archive">

<NC:handlerProp RDF:resource="urn:mimetype:handler:application/octetstream"/>

and so on.

Be sure to exit and restart FF then try downloading 1 of these .ext's, works flawlessly for me on latest FF v3.5.4 :)