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The three aforementioned Linux system fonts can still be used as default display fonts.Mozilla Foundation Security Advisory 2022-38 Security Vulnerabilities fixed in Thunderbird 102.2.1 Announced AugImpact high Products Thunderbird Fixed in Instead of "sans-serif", "serif" or "monospace" users should select "Helvetica, Arial", "Times" or "Courier" (or "Fixed Width") respectively. Users who had selected one of these fonts as their default composition font have to select a different font. Therefore and for compatibility with Thunderbirds on other platforms, the ability to compose messages using these three fonts was removed on Linux. These font names conflict with the generic CSS font family names. Linux provides system fonts "sans-serif", "serif" and "monospace". You can even compose messages in different languages concurrently now without having to switch dictionaries. Also, the spell checking language is now always synchronised between subject and message body. Inline spell checking: New messages will now always be spell-checked in the language selected in Tools > Options > Composition > Spelling > Language and not as before in the last language used. The inline spell checker no longer loses red underlines. Also, the composition font is no longer lost after pasting a bitmap from the clipboard. Some idiosyncrasies in the message compose window have been addressed: The composition font is no longer lost after clicking elsewhere in the message and then returning to the end of the line of the text being entered.
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Starting in Thunderbird 38, the Lightning calendar add-on is bundled with Thunderbird. Thunderbird 38 now supports the OAuth 2.0 protocol now used by Google for authentication. Or, click the toolbar menu button and then select Options > Layout > Folder Pane Columns Preferences > Layout > Folder Pane Columns. To show the column picker using the traditional menu bar, select View > Layout > Folder Pane Columns. In the folder pane (the list of folders on the left), you can now show the column picker for expanded options (Unread, Total and Size) without using the Extra Folder Columns add-on, which is now incompatible. You can now search multiple address books! You can now filter on sent and archived messages. Thunderbird chat now supports Yahoo Messenger.
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