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tabs and menu colors changed

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The newest version of Firefox 89.0 (20210527174632) was installed the other day and now I have all background colors in light gray.Tried to change themes - I have default in light colors, but even the when picking the theme it is displayed with night blue background for tabs that are not open (what I used to have) - instead now I have all tabs and the menu bar in the same bland light gray color. Please help me establish my old color scheme before the upgrade. Thank you.

The newest version of Firefox 89.0 (20210527174632) was installed the other day and now I have all background colors in light gray.Tried to change themes - I have default in light colors, but even the when picking the theme it is displayed with night blue background for tabs that are not open (what I used to have) - instead now I have all tabs and the menu bar in the same bland light gray color. Please help me establish my old color scheme before the upgrade. Thank you.

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I have been having the exact same problem. I have Enabled and Disabled the built-in System Theme that is suppose to be dark at top but everything remains Very White / Grey. And no updates are available when checked. Please help!