I upgraded from Breezy to Dapper on Friday. I noticed this problem today, ie. that typing the command "firefox" from the command line immediately returned without any error message, and without starting the browser.
Running the browser directly produced the following error message: ~$ /usr/lib/firefox/firefox-bin -a firefix /usr/lib/firefox/firefox-bin: error while loading shared libraries: libmozjs.so: cannot open shared object file: No such file or directory However, the libmozjs.so file is present and readable: ~$ locate libmozjs.so /usr/lib/firefox/libmozjs.so ~$ ll /usr/lib/firefox/libmozjs.so -rw-r--r-- 1 root root 618564 Jun 8 20:06 /usr/lib/firefox/libmozjs.so -- firefox will not start. https://launchpad.net/bugs/39351 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs