Sorry, I can't anymore since I now have the flat version. So far it didn't happen even in this package but if it will I'll then report it again here and also open a bug report on bugzilla.mozilla.org, maybe with some logs that I read from the console. Probably the most similar (if not the same) currently available is this 👉 https://bugzilla.mozilla.org/show_bug.cgi?id=1486231, the first attached screenshot shows the tab without its content despite it finished loading (because there's no loading animation and no 🗙 button).
** Bug watch added: Mozilla Bugzilla #1486231 https://bugzilla.mozilla.org/show_bug.cgi?id=1486231 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032660 Title: Blank tabs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/2032660/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
