libresolv.so is a symbolic link to libresolv.so.2, which is installed by libc6.
Nothing in thunderbird itself appears to link against the unversioned so, so the problem is most likely somewhere else (in TbSync itself maybe?). Can you get more details on how this add-on depends on libresolv.so (maybe get its maintainer to comment here)? ** Changed in: thunderbird (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875348 Title: dependence upon libresolv.so (libc6-dev) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1875348/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs