The top bar of uol.com.br (the largest portal in Brazil, which is the largest speaking Portuguese country in the world) gets broken in the built-in implementation after a translation has started, while it doesn't on the addon.
Bug 1840913 Comment 0 Edit History
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The top bar of uol.com.br (the largest portal in Brazil, which is the largest Portuguese speaking country in the world) gets broken in the built-in implementation after a translation has started, while it doesn't on the addon.