Firefox on MacOS: Default filename when downloading

When downloading from Firefox on MacOS, I would like the filename to be prefixed by the ISO-date (YYYY-MM-DD-original-filename.extension). This can be achieved with a folder action in the downloads folder, but I want it to be in all folders, so a folder action is not an ideal solution.

If possible I'd like all new files to have the prefix, regardless of the creating app.

Is this possible?

Solution 1:

My solution was to make an Automator workflow to run a shell script, and map it to a universal keyboard shortcut. This has been very useful to me, so here it is:

# echo `date +"%Y-%m-%d "` + " "
A=`date +%F`
echo "$A "

Open Automator and create new workflow.

Set workflow to receive text from any application, choose to replace the selected text and add Run Shell Script. Choose /bin/bash and pass input to stdin. Paste the script and save.

Go to System Preferences, choose Keyboard and Shortcuts. Choose Services, find yours on the list and map a shortcut.