3 ms·
LeechBlock does wonders to me. https://addons.mozilla.org/en-US/firefox/addon/leechblock-ng/ https://addons.mozilla.org/en-US/firefox/addon/leechblock-ng... Or
by imhoguy 8y ago
LeechBlock does wonders to me. https://addons.mozilla.org/en-US/firefox/addon/leechblock-ng/ https://addons.mozilla.org/en-US/firefox/addon/leechblock-ng...
Or try to switch to some CS/programming tutorial videos.