i promised myself i'd release this if tamamo won against 2B today so here it is
https://kitsunemimi.club/git/bronze/booru-tools
a mass downloader for gelbooru, simply put all your links in a "files.txt" and run the script and it will download and tag your files
as for whether your file browser supports tags, see this:
https://wiki.archlinux.org/title/Extended_attributes
if it doesn't, beg your DE maintainers for this feature
at some point I'll expand it to other boorus (probably next week)