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i don't show the "beautify" and the "copy to clipboard" icons ?
I observe that after following the thread:
Styles won't install -Temporary Workaround-
and inspect my userscripts working on these pages to see which can interfere with the install of userstyle (i can't install one without accept the upgrade of stylish addon - which i don't want for this profile).
It's seems not your case (if i disable greasemonkey , i have the same problem)