Same situation here. Removing the old symlink from /usr/bin/firefox to /usr/libfirefox-3.5 and creating a new one to /usr/lib/firefox-3.6.3 solves the problem.
Same situation here. Removing the old symlink from /usr/bin/firefox to /usr/libfirefox-3.5 and creating a new one to /usr/lib/ firefox- 3.6.3 solves the problem.