I agree that mozilla-thunderbird should not leave this stuff in the environment when invoking external programs. Ideally, it would be compiled with appropriate rpath options to make setting LD_LIBRARY_PATH unnecessary.
Note that firefox itself almost certainly has a similar bug: it leaves LD_LIBRARY_PATH containing /usr/lib/firefox when it runs external programs.
I agree that mozilla-thunderbird should not leave this stuff in the environment when invoking external programs. Ideally, it would be compiled with appropriate rpath options to make setting LD_LIBRARY_PATH unnecessary.
Note that firefox itself almost certainly has a similar bug: it leaves LD_LIBRARY_PATH containing /usr/lib/firefox when it runs external programs.