Recognizes system theme (dark/light mode) but fails to update automatically

[voskresenie]

First, thank you for making this extension. It adds very nice functionality to firefox.

Second, I'm experiencing a problem with the Change themes based on system theme option. It seems to detect whether the system is in dark/light mode, but it does not initiate an automatic update. (I haven't experienced this problem with time-based switching.)

Scenario

Begin with the theme correctly matching system theme; in this example, that is dark mode / nighttime theme.

Then, I update system to light mode. You can see that the page itself correctly detects that the system is now in light mode, but the theme does not update automatically to the daytime theme, even after several hours.

However, if I manually update the settings (here I select a different daytime theme), automaticDark updates to this new theme (indicating the extension is aware of the current system theme).

Then, if I switch the daytime theme back to its original setting, the extension switches to that theme (ie continues to use the daytime theme).

Conclusion

It seems that the extension can correctly detect whether the system is in light or dark mode, but fails to automatically change the theme when that happens.

Thank you,
vosk