// I recently discovered I can click one tab - then hold shift and select a group - and then move those to a new browser window - then ctrl-shift-D to save all into a bookmarks folder name. //
You can just select tabs then right click on a tab to bookmark all into a folder. No need for the new window stuff.
A heads-up that VSCode's remote extensions and Python LSP (pylance) are proprietary. So they can't be used in forks like VSCodium. Pylance is set to replace the current Python LSP.
So, it's like android - touted as open source but with gotchas that you stumble upon once you are invested in the software, and that creates a lock-in effect. Also, the VSCode binaries released by Microsoft are non-FLOSS licensed and contain telemetry. That's why VSCodium exists, but they are crippled due to at least 2 core extensions being proprietary.
Possibly more core extensions could become proprietary.
PS: I know MS created LSP, so no need to remind in reply.
https://www.youtube.com/watch?v=uClWlVCwHsI