This commit is what's causing the hang: https://hg.mozilla.org/releases /mozilla-beta/rev/5f0dcca70da9.
I did a test build without --enable-stdcxx-compat, which is what triggers this code to be built, and isn't required any longer, because since https://bazaar.launchpad.net/~mozillateam/firefox/firefox.xenial/revision/1391 we're statically linking against the libstdc++ in gcc-mozilla, and the hang at startup is gone. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1885159 Title: Firefox 78.0 RC hangs at startup on Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1885159/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
