Install on Brave

Extract the ZIP and open the browser profile you want to use.
Enter brave://extensions/ in the address bar.
Enable Developer mode, select Load unpacked, and choose the chromium folder.
Open Bookmark Vault from the Extensions menu.
Choose Connect Cloudflare, enter your Worker URL and token, and save.
Choose Check connection, then Back up now in your primary profile.

Keep the unpacked extension folder in place.