Hi Gregory,
Thank you for your feedback. For further discussion and feature requests, I encourage you to open a bug on our issue tracker at https://crbug.com/. This will allow you to directly communicate with the engineers responsible for these features.
I suspect the warning you're encountering is a safety feature designed to protect users from potential threats when downloading files from insecure (HTTP) connections. Users can choose to proceed with the download, once they are aware of the associated risks. An attacker on your local network can impersonate this website and deliver malicious files not originating from it.
If the website delivers the file over a secure (HTTPS) connection, the warning should not appear. For example, you can try accessing the same file over HTTPS here: https://cdn.glitch.global/96f7eeaf-eb60-48ab-a6d7-16f20bd68860/QM_colloq.pdf?v=1716890210284
Thank you for your understanding.
Arthur @arthursonzogni