app icon options?
In Thunderbird (60.6.1) on my Mac (10.11), the dock icon for TB expands to include the choice "App Icon Options...". I select that, and nothing happens. What is it? Where did it come from? What is it supposed to do? It doesn't appear for any other apps in my dock. Is it associated with some TB extension or plug-in?
In Thunderbird (60.6.1) on my Mac (10.11), the dock icon for TB expands to include the choice "App Icon Options...". I select that, and nothing happens. What is it? Where did it come from? What is it supposed to do? It doesn't appear for any other apps in my dock. Is it associated with some TB extension or plug-in?
由user700204于修改
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C'mon, folks. The Thunderbird Forum doesn't know the answer to this?