The following logs are extracted from pasting texts to Firefox's address
bar and a Google Doc page in Firefox, respectively.
[2021-05-16T00:03:14] DEBUG1: request for clipboard 342, target text/plain;charset=utf-8 (600) by 0x03000044 (property=GDK_SELECTION (511))
[2021-05-16T00:03:22] DEBUG1: request for clipboard 342, target application/x-moz-nativehtml (603) by 0x03000044 (property=GDK_SELECTION (511))
Inspired by https://github.com/debauchee/barrier/pull/461. Should fix
pasting unicode on X11 https://github.com/debauchee/barrier/issues/344.
Chih-Hsuan Yen