Reproduce: 1. New msg (HTML compose), write a line 2. Doubleclick on text in a textfield, e.g. the urlbar or the summary line on this bug. 3. Copy (not necessary on Unix) 4. Paste into the middle of the line in the composer 5. Debug|Output HTML 6. Copy&paste something from another app Actual result: After step 4: You see newline, pasted text in monospace, newline. After step 5: Debug output shows that a <pre> is around the pasted text. After step 6: The text is pasted without any formatting, i.e. the pasted text has the same formatting as the surrounding text. Expected result: Step 4 is similar to step 6. No <pre> after step 5.

This makes pasting URLs into mails very hard (have to paste in another app and then paste back into Mozilla) -> mozilla0.9 nomination.

(This is a split off of 55661 to mention this bug as back reference.)

*** This bug has been marked as a duplicate of 56135 ***

verified in 10/19 build.