User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:66.0) Gecko/20100101 Firefox/66.0
Steps to reproduce:
Run Firefox Aurora 66.0b14 for MacOSX 10.14.3 Mojave with Dark Mode enabled.
o Form text appears black on white background, should be white on black
o File->Open displays default light grey form background with black text
o Bookmarks->Show All Bookmarks displays similar light background forms.
This is REGARDLESS of selecting either the 'Dark Mode' theme in Firefox Extensions/Theme preferences,
OR selectng the 'Default' theme.
When I manually edit the file:
/Applications/Firefox Developer Edition.app/Contents/Info.plist
to content in the main dict:
Then at least the File->Open dialog has a dark background, but the
Bookmarks->Show All Bookmarks and other dialogs still have the
light background, but now have invisible white text, as do form entries.
The MacOSX version of firefox should detect that MacOSX 10.14.3+ Mojave is installed,
and that its Dark Mode feature is enabled, form entry text should be in the default
WHITE text on BLACK background,
ALL dialogs should have DARK backgrounds and LIGHT text -
and should honor the 'Dark Mode' theme settings - but it does not.
Firefox should in my opinion apply some sort of 'visibility filter' to make its form
dialog text visible under all circumstances.