all AutoHotkey APPs/scripts you can run from USB drives.
In some cases the drive must be writable i.e. in the shortcutter.ahk case
Note: if you save/backup an .ahk file to an usb drive you need too the AutoHotkey.exe if you swicht with this drive to a pc without an ahk.exe.
On your pc it doesn´t matter where the files are located.
One case where a portable file is the onliest solution.
You can change the behaviour from your additional mouse keys on your
xbutton1::send ^c ; browser back to copy
xbutton2::send ^v ; browser forward to paste
You can define this too in the shortcutter.ahk file.