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ChiudiRecensione di thugcee per Provider for Google Calendar
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UPDATE: It looks that installing Startupmaster (https://addons.mozilla.org/pl/firefox/addon/startupmaster/), as Philipp suggested, solved all problems. This make me think that previous problems came from unfortunate Thunderbird design, so I'm changing rate :) Thank you Philipp for solution.
I had always problems with this add-on. Few was not too annoying, like spawning many master password windows, occasionally disabling calendars, asking for Google password every Thunderbird restart. Some very annoying, like inability to dismiss event alert. But today I had to remove it because it's got crazy and has broken thunderbird (it was spawning dozens of empty windows, disabling all extensions, asking for google password every minute). That was too much.
Please try installing the Startupmaster extension in addition to the Provider.
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