You could use the ad & content blocker uBlock Origin to zap any addictive elements of the site, like the main page feed or the Quick Takes or Popular Comments. Then if you do want to access these, you can temporarily turn off uBlock Origin.
Incidentally, uBlock Origin can also be installed on mobile Firefox, and you can manually sync its settings across devices.
You could use the ad & content blocker uBlock Origin to zap any addictive elements of the site, like the main page feed or the Quick Takes or Popular Comments. Then if you do want to access these, you can temporarily turn off uBlock Origin.
Incidentally, uBlock Origin can also be installed on mobile Firefox, and you can manually sync its settings across devices.