How do I avoid the narrowing-and-fading effect Thunderbird vertical scrollbars?
I'm using Thunderbird v. 143 on a Windows 11 23H2 machine, and I'm bothered by how the vertical scrollbars look. I want the toolbars to always be prominently visible and have a decent width and clear position indicator. instead, when a scrollbar is not focused, it becomes very narrow - maybe 4-5 pixels on a 1920-pixel display - and its position indicator bec