Somehow - was it my clicking 'Default Colours'? - the following options within Bling -> Colours have become unselectable, though no option gets in any way greyed out.
- The two options within 'Individual Tab Color Appearance', those options being the 'stripped' option and the 'filled' option.
- The 'transparent' option within the 'Shadows' Vs 'transparent' .
Screenshot:
Restarting Thunderbird fixed problem 2, i.e. re-enabled the selection of the 'transparent' option, but did not fix problem 1.
If any of this behaviour is by design - and it is true that I understand little of the 'bling' options - then the deliberately disabled options ought to be clearly disabled.
QF 6.14.2
Betterbird 140.7.1esr
Windows 10 Pro - 22H2 (2009: 19045)