Could be both. You can enforce it: https://addons.mozilla.org/en-US/firefox/addon/activate-reader-view/

In my homelab I have Debian VMs originally set up with Debian 6 in 2011 which were upgraded another 6 major releases to now Debian 12 over the years. When I think about Debian I always get a very warm cozy feeling.

Since it has to happen in windows safe mode it seems to be very hard to automate the process. I haven’t seen a solution yet.

It is annoying. Some possible solutions:

On desktop: Using Shift + ALT you often can overrule this and select text anyway.

On mobile: Using the reader mode or the Print preview often works. It does for me on this website.