Firefox on Windows 11 fix for missing scrollbars

On Windows 11, Firefox doesn’t show some scrollbars. This affects the projects and topology screens of FlexDeploy.

There are 2 options to fix this problem.

Option 1: Set scrollbars to always display in Windows 11. This is an operating system setting so it will impact all applications.

1. Go to Settings > Accessibility > Visual effects

2. Set "Always show scrollbars" to On

Option 2: Change settings in Firefox

This will only impact Firefox but takes more effort. Note: there may be other settings in about:config which adjust these scrollbars as well. If you find something new/different, please pass it along.

1. Open a new tab

2. Go to about:config

3. Accept any risks

4. Search for widget.non-native-theme.scrollbar.style

5. Change value from 0 (Default OS) to 4 (Windows 10 style)

6. Search for widget.windows.overlay-scrollbars.enabled

7. Change value from true to false

8. Search for widget.non-native-theme.win.scrollbar.use-system-size

9. Change value from true to false