LemonBlock is a Safari Content Blocker FOR DEVELOPERS that only has one rule: No External Scripts. This may break functionality on some sites but usually it just blocks a whole bunch of junk that wastes battery and bandwidth.
You can temporarily disable Content Blockers by long pressing on the Refresh button in Safari and selecting "Reload without Content Blockers".
For Developers, LemonBlock represents a worst case scenario. If you can work with LemonBlock, you should survive other Content Blockers.