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Add extra features and styles to make Thunderbird your own.Close
Allow HTML Temp 5.7.3 Requires Restart
Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).
About this Add-on
* The button in main toolbar has to be added by customizing the toolbar
* The button in message header pane has to be added by customizing this toolbar.