Adjust your monitor brightness

Do you currently have dark background just like with using a dark theme ? Can you attach a screenshot? *https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem *use a compressed image type like PNG or JPG to save the screenshot You can also check the default colors for websites: Make sure you haven't enabled High Contrast Mode in the OS settings. Make sure you allow pages to choose their own colors. *Settings -> General: Fonts & Colors -> Colors: "Override the colors specified by the page with your selections above" Try "Never" if the default "Only with High Contrast themes" isn't working.