Even I got the same result. But this seem to do the job: https://addons.mozilla....

		option_greek on Oct 2, 2013 \| parent \| context \| favorite \| on: Firefox fixes save gigabytes of memory on image-he... Even I got the same result. But this seem to do the job: https://addons.mozilla.org/en-US/firefox/addon/hide-caption-... Edit: aah got it. The OP mentioned that you have to use 'Nav bar on title bar' extension along with tree style tabs.