Self-hosted browser and mail extensions. Nothing here is a public download page — these are update endpoints that the applications poll on their own.
Clips messages into a Notion database — full body, attachments, classification and summaries generated locally.
Update manifest: /thunderbird/send-to-notion/updates.json
A self-hosted Chrome extension needs a packed .crx and an updates.xml under /chrome/, plus an enterprise policy on the machine — Chrome will not auto-install from outside the Web Store otherwise.