When using Firefox to download a part library from - let's say mouser.com - the watcher (within the GUI) throws an error
Error: invalid digit found in string while the file is still downloading (and has the *.part ending on the disk).
Once the file is downloaded and gets renamed from XXX.zip.part to XXX.zip however, the watcher no longer detects it as new file.
This basically renders the watcher useless when using Firefox.