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How do I add the "Compact Headers" add-on to Thunderbird 147.0.1, please?

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algoright
algoright

How do I add the "Compact Headers" add-on to Thunderbird 147.0.1, please?

How do I add the "Compact Headers" add-on to Thunderbird 147.0.1, please?

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christ1
christ1
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https://support.mozilla.org/kb/installing-addon-thunderbird

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