Along with your message and category, we attach: your Discord username, ID, and avatar (so we can reply); the server you were viewing and your role there (if any); the page you were on; and your browser's user-agent string plus window size. The browser details exist purely to debug “doesn't work on my screen” reports.
We don't capture message contents from your server, cookies, IP address, or anything you didn't type here. Reports are visible only to project maintainers. Replies come back to you here and as a Discord DM.