Take up the issue with the eff site or your Service provider. It is not likely to be Firefox issue. I am able to down load the file. I presume it is only the eff site that you have an issue with.

• See What to do if you can't download or save files

Install at your own risk.

• They have not included it in the official Firefox addons so Firefox (Mozilla) has not checked and approved this as safe.
• It is advertised as a Beta product and so is not fully developed and tested.

You may also be interested in

• A little known option What happened to Tracking Protection?
• And another option as an addon https://www.mozilla.org//lightbeam/
  Gives rather surprising results, if you have no blockers.
  • From https://addons.mozilla.org/firefox/addon/lightbeam/

Do you know whether that is the same version as the one here: https://addons.mozilla.org/firefox/addon/privacy-badger-firefox/

Some users have reported this connection issue when trying to install the LastPass and Yahoo! toolbar extensions from their respective publishers' sites. Both of those redirect your request to a different address. It doesn't look like https://s.eff.org/files/privacy-badger-latest.xpi is doing that.

Using the URL jscher2000 suggested worked, and John99 provided some useful info. So thanks to both of you.

thanks for your help.