Can't select the text of multiple bullets

Steps to reproduce

  1. open a document with bullets extending beyond the screen, each one several lines long
  2. try to select the text in the bullets by double clicking in the middle of a bullet and dragging to the bottom of the screen

Expected result

I expect the screen to scroll, letting me select more bullets. It used to be possible because I used this movement on a daily basis.

Actual result

I can only select the bullets that are currently visible on my screen. The scrolling by dragging the cursor down doesn’t work and stops at the edge of the screen.

Environment

Windows 10, Firefox, not sure where to find the version number, no third-party scripts