Diễn đàn hỗ trợ Firefox

For the last several FF versions, although I choose a light theme, the pull downs/menus always wind up dark with white text. It also shows up when I am editing options in FF itself. How do I stop this? I want a light background with black/dark text.

The last update changed all my drop down menus to a dark color. I can't even see the line separators in my bookmarks. My Firefox page is also dark and ugly. Right now, when at work, I have to use another browser because I can't do my work with these dark drop down menus, the text is unreadable. Why did you guys do this? FYI: My PC uses Windows 7