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My tree style tabs have disappeared after Firefox update. It's not disabled.

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My tree style tabs have disappeared. I did not enable split screen, but it appeared at one point. Please help.

My tree style tabs have disappeared. I did not enable split screen, but it appeared at one point. Please help.

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Hello,

A theme is an add-on that changes the visual appearance of Firefox. You can switch to another theme as follows:

  1. Click the menu button Fx89menuButton and choose Add-ons and themes.
  2. Switch to the Themes panel.
    • The built-in default System, Light, Dark and Alpenglow themes will be listed, as well as any themes you installed yourself.
  3. Find the theme you want to use and click the Enable button.

To uninstall any themes you installed yourself, click the ellipsis Fx107-Addons-3dotIcon (3-dot) icon and click the Remove button.

For more information about Firefox themes, see the articles Use themes to change the look of Firefox and Built-in themes in Firefox - alternative to complete themes.

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