When attempting to use !LAST_DOWNLOADED_FILE_NAME as follows:
{
"Command": "onDownload",
"Target": "${!Last_Downloaded_File_Name}-Category=${Categories}-Tags=${Tags}",
"Value": "false"
},
Firefox 76 64-bit for Linux using UI.Vision RPA 5.8.8
* [warning][Line 3](moz-extension://21d3ef46-c479-49fb-9467-58437945c3be/popup.html#): onDownload - changing file names not supported by Firefox extension api yet
* [error][Line 3](moz-extension://21d3ef46-c479-49fb-9467-58437945c3be/popup.html#): Internal variable "!LAST_DOWNLOADED_FILE_NAME" not supported
Chromium Version 81.0.4044.138 (Official Build) Built on Ubuntu using UI.Vision RPA 5.8.8
[error][Line 3](chrome-extension://gcbalfbdmfieckjlnblleoemohcganoc/popup.html#): Internal variable "!LAST_DOWNLOADED_FILE_NAME" not supported