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Getting error in Mozilla Thunderbird that says "could not find the Mozilla runtime."

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Getting error in Mozilla Thunderbird that says "could not find the Mozilla runtime."

Getting error in Mozilla Thunderbird that says "could not find the Mozilla runtime."

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a reinstall should fix that.

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I had this problem just now. It turns out that uninstalling and then installing Firefox is what's needed. Doing that to Thunderbird doesn't help.