**Let's keep this open as a placeholder bug in Thunderbird, although the actual problem is in `Core: DOM: Editor`. Any further duplicates should go to Core bug 1674359.** As recent comments on bug 535475 show, Thunderbird users aren't happy to still be forced into workarounds 12 years after this bug has been recorded (10 years in `Core: DOM: Editor`). I'm trying to get some traction on this in the most recent duplicate, bug 1674359, which has a perfectly reduced testcase and was recently filed by Mirko who's involved in the area, so it has recent activity and the right people on board.
Bug 1525576 Comment 5 Edit History
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**Let's keep this open as a placeholder bug in Thunderbird, although the actual problem is in `Core: DOM: Editor`. Any further duplicates should go to Core** bug 1674359. As recent comments on bug 535475 show, Thunderbird users aren't happy to still be forced into workarounds 12 years after this bug has been recorded (10 years in `Core: DOM: Editor`). I'm trying to get some traction on this in the most recent duplicate, bug 1674359, which has a perfectly reduced testcase and was recently filed by Mirko who's involved in the area, so it has recent activity and the right people on board.