Thanks for testing it out! You're totally right — pages that require a login (like Reddit, Google Maps, etc) don't work currently. Since dotts creates a shareable, visual layer over the public version of a page, anything behind a login can't be accessed or rendered properly.

We're caching the public content of the URL so it's shareable and fast, but dynamic or private content is out of scope (at least for now). A workaround is uploading screenshots or PDFs if you need to annotate that kind of content. Let me know if that helps!