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Please note: Tlgr.org is an unofficial version (hereinafter the 'mirror') of the site Telegram.org. This mirror was created to be able to access the official website Telegram.org at any time while it is unavailable due to any local network problems. If the official website Telegram.org is available, we recommend using only that. The transmitted information is not stored on the mirror side and is provided on an as-is basis.
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MORE IMPORTANT: last option ("Use system window frame") should be put as first and dis/activate the other three, since if that one is disabled, users won't see the effect of other options!