Why can't create a shortcut icon in start menu?

Question

I can create a shortcut icon in the start menu for firefox:

sudo vim  /usr/share/applications/firefox.desktop
[Desktop Entry]
Encoding=UTF-8
Name=Mozilla Firefox not esr 
Comment=Browse the World Wide Web
Type=Application
Terminal=false
Exec=/usr/local/bin/firefox %U
Icon=/opt/firefox/browser/chrome/icons/default/default128.png
StartupNotify=true
Categories=Network;WebBrowser;

In similar fashion, I want to create a shortcut icon in start menu for tor-browser too:

sudo vim  /usr/share/applications/start-tor-browser.desktop
[Desktop Entry]
Type=Application
Name=Tor Browser
GenericName=Web Browser
Comment=Tor Browser  is +1 for privacy and −1 for mass surveillance
Categories=Network;WebBrowser;Security;
Exec=sh -c '"/home/tor-browser/Browser/start-tor-browser" --detach || ([ !  -x "/home/tor-browser/Browser/start-tor-browser" ] && "$(dirname "$*")"/Browser/start-tor-browser --detach)' dummy %k
X-TorBrowser-ExecShell=./Browser/start-tor-browser --detach
Icon=/home/tor-browser/Browser/browser/chrome/icons/default/default128.png
StartupWMClass=Tor Browser

Why no shortcut icon in the start menu for my tor browser?

Answer 1

There is specific procedure to have it in desktop's application menu, you need to execute:

'./start-tor-browser.desktop --register-app'

Note: (comments from the Tor Browser project)

When invoked from the shell, this file must always be in a Tor Browser root directory.

When run from the file manager or desktop GUI, it is relocatable. After first invocation, it will update itself with the absolute path to the current Tor Browser location, to support relocation of this .desktop file for GUI invocation.

Note: This information can be found within tor-browser-linux64-12.0.2_ALL.tar.xz file, namely start-tor-browser.desktop file, which is part of the archive.