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Thunderbird unusable: Toolbar/menu bar/ribbon has disappeared completely (only a white space is displayed)

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In both Firefox and Thunderbird, I have this problem where the toolbar/ribbon disappears completely. Only the content of the active tab is visible. In Firefox, when I try to close the window via the Windows task bar, I get a question whether I want to close all open tabs (but they are not visible, only the active one is.) I found a reset button to reset add-ons and settings, after which I can reuse Firefox until the problem happens again (https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings#). In Thunderbird, I only see the content of the current email, no tabs, no ribbon, no way to get to the folder structure (where the Inbox etc. would be shown). For now, I have switched back to Outlook, although I'd rather not use it...

I have tried to click or right-click on the white space where the ribbon would normally be, hoping that the icons would only be hidden, but still clickable. But when I do that, I instead activate the window underneath it (until I have closed them all and there is not window underneath anymore.)

I have read that there can be issues with tabs when the window is maximized, but I cannot reduce it since the "-" symbol is not displayed. Is there a keyboard shortcut or an F-key combination that will reduce the window size (i.e. get out of "Maximized" mode)? maybe that might help.

In case I get disconnected, could you please also provide info as to how to get back to this topic?

Thank you! Sibylle

In both Firefox and Thunderbird, I have this problem where the toolbar/ribbon disappears completely. Only the content of the active tab is visible. In Firefox, when I try to close the window via the Windows task bar, I get a question whether I want to close all open tabs (but they are not visible, only the active one is.) I found a reset button to reset add-ons and settings, after which I can reuse Firefox until the problem happens again (https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings#). In Thunderbird, I only see the content of the current email, no tabs, no ribbon, no way to get to the folder structure (where the Inbox etc. would be shown). For now, I have switched back to Outlook, although I'd rather not use it... I have tried to click or right-click on the white space where the ribbon would normally be, hoping that the icons would only be hidden, but still clickable. But when I do that, I instead activate the window underneath it (until I have closed them all and there is not window underneath anymore.) I have read that there can be issues with tabs when the window is maximized, but I cannot reduce it since the "-" symbol is not displayed. Is there a keyboard shortcut or an F-key combination that will reduce the window size (i.e. get out of "Maximized" mode)? maybe that might help. In case I get disconnected, could you please also provide info as to how to get back to this topic? Thank you! Sibylle
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Изменено Sibylle_Walker

Выбранное решение

In the meantime, a German Thunderbird user has given me the following instruction, which has worked: delete the file "xulstore.json" in my Thunderbird profile. That has done the trick! Thank you as well, for your suggestion.

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  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0

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sfhowes
  • Top 10 Contributor
1649 решений 7948 ответов
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What is your Windows 10 theme? I think there must be a conflict between that theme and the dark one you've applied in TB. Use a simple, default Windows theme and try the Default or Light theme in TB.

What is your Windows 10 theme? I think there must be a conflict between that theme and the dark one you've applied in TB. Use a simple, default Windows theme and try the Default or Light theme in TB.
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Выбранное решение

In the meantime, a German Thunderbird user has given me the following instruction, which has worked: delete the file "xulstore.json" in my Thunderbird profile. That has done the trick! Thank you as well, for your suggestion.

In the meantime, a German Thunderbird user has given me the following instruction, which has worked: delete the file "xulstore.json" in my Thunderbird profile. That has done the trick! Thank you as well, for your suggestion.
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