Has anyone seen this problem? I installed @loujin’s userscript “mb-reledit-copy_dates.user.js”, and entered the Edit Relationships page for a Release. I did not see any buttons or other UI about copying dates. I expected to see an H3 heading Dates just under the row of tabs “Overview”, “Disc IDs”, …, “Edit”, with buttons “Copy dates” and “Remove dates”.
I did a little poking around with web developer tools, and couldn’t figure out the problem. Reloading the Edit Relationships page, or exiting and re-entering the page, did not help.
I’m using Firefox 58.0.2 on Mac OS X 10.11.6. A few months ago, on a much older version of Firefox, an earlier version of this userscript this worked for me.
The Dates buttons do show up as expected on Chrome 64.0.3282.140. So, using Chrome is a workaround. Installing “MusicBrainz relation editor: Copy dates on recording relations” from GreasyFork gave the same results.
Any ideas for how to make the userscript work in Firefox?