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Firefox Quantum mostra tela branca com disco de carregamento no centro que aparece rapidamente ao clicar em abas ociosas

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O Firefox Quantum mostra uma tela branca com disco de carregamento no centro que aparece rapidamente ao clicar em abas ociosas como se fosse a tela branca que o Chrome exibe na mesma situação. Me parece que uma função de "hibernar abas" foi implementada nesse novo Firefox. Como faço para desabilitá-la pelo about:config?

O Firefox Quantum mostra uma tela branca com disco de carregamento no centro que aparece rapidamente ao clicar em abas ociosas como se fosse a tela branca que o Chrome exibe na mesma situação. Me parece que uma função de "hibernar abas" foi implementada nesse novo Firefox. Como faço para desabilitá-la pelo about:config?

Chosen solution

Solução respondida na versão desta pergunta em inglês:

You need to create a userContent.css to change that white flash to a dark gray / almost black. This also changes the color of the brief white flash before a page loads. Perfect for night. Go to about:support in your Firefox browser, click the button labeled "Open folder" in the Profile Directory section. A new Explorer window will open, now create a chrome folder and inside that folder, create a new text document labeled userChrome.css not .css.txt. You may need to enable the File extensions type to be shown via the View panel under Show/hide section. Open the newly created .css file and paste this into it, save it, close it, restart Firefox. .tabbrowser-tabbox { background-color: #a9a9a9 !important; }

Link: https://support.mozilla.org/pt-BR/questions/1187472

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Chosen Solution

Solução respondida na versão desta pergunta em inglês:

You need to create a userContent.css to change that white flash to a dark gray / almost black. This also changes the color of the brief white flash before a page loads. Perfect for night. Go to about:support in your Firefox browser, click the button labeled "Open folder" in the Profile Directory section. A new Explorer window will open, now create a chrome folder and inside that folder, create a new text document labeled userChrome.css not .css.txt. You may need to enable the File extensions type to be shown via the View panel under Show/hide section. Open the newly created .css file and paste this into it, save it, close it, restart Firefox. .tabbrowser-tabbox { background-color: #a9a9a9 !important; }

Link: https://support.mozilla.org/pt-BR/questions/1187472