An update to Joshua Granick's installer from 2012: http://www.joshuagranick.com/2012/04/25/how-to-install-the-standalone-flash-player-on-linux/

install_flash_debugger_for_linux.sh

#!/bin/sh
 
echo ""
echo "-----------------------------------"
echo " Installing Flash Debugger"
echo "-----------------------------------"
 
wget -c https://fpdownload.macromedia.com/pub/labs/flashruntimes/flashplayer/linux64/flash_player_sa_linux_debug.x86_64.tar.gz
tar xvzf flash_player_sa_linux_debug.x86_64.tar.gz
rm flash_player_sa_linux_debug.x86_64.tar.gz
 
# Copying to /usr/lib
 
sudo mkdir -p /usr/lib/flashplayer
sudo mv flashplayerdebugger /usr/lib/flashplayer/flashplayerdebugger
 
# Adding symlinks
 
sudo rm -rf /usr/bin/flashplayerdebugger
sudo ln -s /usr/lib/flashplayer/flashplayerdebugger /usr/bin/flashplayerdebugger
 
# Creating a *.desktop entry
 
echo "[Desktop Entry]
Name=Flash Player Debugger
Exec=/usr/lib/flashplayer/flashplayerdebugger %U
MimeType=application/swf-flash;application/x-shockwave-flash;
Terminal=false
Type=Application
Categories=GTK;GNOME;AudioVideo;Player;Video;" > flashplayerdebugger.desktop
 
sudo mv flashplayerdebugger.desktop /usr/share/applications/flashplayerdebugger.desktop
sudo update-desktop-database
 
echo ""