Sorry for the late reply, you need to use the command:fargred wrote:in /usr/share/mime/packages/freedesktop.org.xml, saved the file, restarted the browser and nothing has changed. Pale moon still suggests to open with plugin Adobe flash or save the file, and when OK button is pressed, it opens flash plugin preferences window.
sudo update-mime-database /usr/share/mime
After you modify the file, otherwise the changes will not recognized.