This is an example. Change everything according to your details (name, browser, icon...)
Go to ~/Desktop -> Open new document -> Rename solus.desktop -> Paste
[Desktop Entry]
Version=1.0
Terminal=false
Type=Application
Name=Solus
Exec=brave-browser https://getsol.us
Icon=/usr/share/icons/hicolor/512x512/places/start-here-solus.png
Make chmod +x ~/Desktop/solus.desktop
executable.