Firefox, get just PDF files from a web page

[Ammammata]

Well, take this as example: http://www.nbastats.net/

I'd like to get only *.xls. and *.txt files

When I click on menu Tools, FlashGot, FlashGot all I get hundreds of small windows asking confirmation
I can avoid this making the download automatic but I'd prefer to filter or select those file *before* I start

How-to?

Thank you

[Ammammata]

Ehm... the title, PDF, was an example: I need a generic filter

[therube]

FlashGot | Options -> Downloads =>

File extensions ~> txt, Add
File extensions ~> xls, Add

(enable) Apply file extension filter to batch downloads too

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You may need to adjust the filters, or change the setting altogether, as your needs change.
An actual download manager may help too?