I am having same problem as user Ruukoto. Open an email in ProtonMail, click the hyperlink, try to delete the mail. It log me out. When I disable this extension, all is fine. It wasted like 1.5 hour of my time and caused major discomfort. This extension is not updated apparently.

Logs me out of sites when following links, especially Youtube, even when adding Youtube and Google to the passthrough list.