If anyone is down to try experimental chrome extensions, Here's my first early release of the last.fm to NOSTR scrobbler extension.
https://blossom.nostrava.xyz/ab947aa5809a66a3bd21c43fb6d1ecb345b114906a7eab7798c9adeff3d7a2a9.zip
If you have a last.fm account, and you have your streaming services hooked up to it, you should start to see them flow through this extension when it's in "syncing" mode. Then you can choose if you want to publish it.
If it doesn't work right away, try refreshing the page, or closing and opening the browser again.
https://github.com/web-scrobbler/web-scrobbler/wiki/Install-an-unpacked-extension
All of the source code is here
https://github.com/ebrakke/nostr-scrobbler/tree/main/lastfm-nostr-extension
nostr:npub1u656f7znujcagfhtgngvtkcflhzptnj38enyzx85da0lh63sfj7qva332p
#music #last.fm #scrobble #otherstuff
https://image.nostr.build/9fd9e53b9f72f9727894d870c5b792bbce422998404fcb0092440666c4d012a3.png
https://image.nostr.build/ed9e5b012f6e35577b69654966e30848c504ae4d4d010bbd1d995dcf479596c3.png