Diễn đàn hỗ trợ Firefox

Firefox displayed a pop-up box on 10/30/22 or 10/31/22 that I accidentally agreed to. The appearance of all my tabs and screens changed. I'm not interested in any other themes. Community support said to install "System" theme to get the default back, but it's not completely the same. For example, checkboxes on forms display as white checkmarks which are hard to see. In my email, the messages and replies display oddly and are hard to read as the contrast is poor. HOW DO I GET ALL MY DEFAULT BACK?

I just opened a pop up that you sent - asking to choose a colour. I had no idea it would change the look of Firefox. Please could you instruct me how to change it back to how it was.

This green is not OK.

Julie